No.169, Science (Kexue) Avenue,National HI-TECH Industry Development Zone, Zhengzhou, China [email protected] 0086-371-86549132

ONLINE MESSAGE
MOBILE CEUCHERS

us patent of process gypsum:

US3307987A - Process of making a gypsum ... - Google

David B i eri ATTORNEY United States Patent Ofifice 3,307,987 Patented Mar. 7, 1967 PROCESS OF MAKING A GYPSUM WALK/BOARD HAVING A DECREASED STARCH CONTENT IN THE GYPSUM CORE David Bier-i,...

US4238445A - Process for manufacturing gypsum board ...

US4238445A - Process for manufacturing gypsum board

US3813312A - Process for making gypsum board - Google

US3813312A US22072172A US3813312A US 3813312 A US3813312 A US 3813312A US 22072172 A US22072172 A US 22072172A US 3813312 A US3813312 A US 3813312A Authority US United States Prior art keywords board accelerator gypsum delayed action density Prior art date 1970-10-05 Legal status (The legal status is an assumption and is not a legal conclusion.

US2913308A - Process for the production of high strength ...

US2913308A US366606A US36660653A US2913308A US 2913308 A US2913308 A US 2913308A US 366606 A US366606 A US 366606A US 36660653 A US36660653 A US 36660653A US 2913308 A US2913308 A US 2913308A Authority US United States Prior art keywords gypsum water steam pressure square inch Prior art date 1953-07-07 Legal status (The legal status is an assumption and is

US Patent for Process for continuously calcining gypsum

Wet chemical gypsum cake may be directly fed to a continuous kettle calciner to produce a stucco having lowered dispersed consistency. Pre-drying of the chemical gypsum is eliminated and the thus produced stucco may be used in the formulation of building plasters and in gypsum wallboard manufacture that will use less fuel for drying excess gauging water.

US Patent for Process and device for stabilising, cooling ...

2011-8-10 · The present invention relates to a process for the continuous conditioning of gypsum plaster. Gypsum is a technical, mineralogical term for the chemical compound calcium

US3415910A - Calcined gypsum and a method for its ...

- Google Patents US3415910A - Calcined gypsum and a method for its preparation

Process for preparing calcined gypsum and gypsum board ...

A process for preparing calcined gypsum (stucco) which comprises treating a mass of calcined gypsum by adding, with thorough blending, small portions of an aqueous solution of ligno sulfonate; allowing the treated stucco to heal; and optionally drying the healed stucco and

Process of making anhydrous calcium sulphate - UNITED ...

The present invention relates to a process of making a new form of insoluble calcium sulfate anhydrite, characterized by very fine crystal size, high plasticity, high water carrying capacity and consisting of minute agglomerated crystal masses, individual crystals having a tendency toward rounded edges and an absence of elongated and acicular particles.

Process for the production of gypsum-based composite ...

1998-8-7 · A process for the production of a gypsum-based composite board or shaped body from a mixture comprising calcium sulfate dihydrate and water, which comprises. a) shaping the mixture to give a raw form, and. b) hardening the raw form by treating it with water at a pressure exceeding the saturation vapor pressure of the dihydrate (3/17).

Process for preparing calcined gypsum and gypsum board ...

A process for preparing calcined gypsum (stucco) which comprises treating a mass of calcined gypsum by adding, with thorough blending, small portions of an aqueous solution of ligno sulfonate; allowing the treated stucco to heal; and optionally drying the healed stucco and

US Patent for Process for directly producing sulfur ...

2010-7-5 · Provided is a process for directly producing sulfur trioxide and sulfuric acid from gypsum. Sulfur trioxide is directly substituted with silicon dioxide by thermal or light-quantum activation, which is assisted with catalytic activation, while restraining reducing atmosphere and removing the resultant sulfur trioxide in time. The resultant sulfur trioxide is then used as raw material to ...

Patents Assigned to National Gypsum Company - Justia ...

2016-10-17 · Patents Assigned to National Gypsum Company ... Abstract: A process for controlling the embedding depth of reinforcing mesh to a cementitious board is disclosed. The process comprises applying a pressure from a plate to a reinforcing mesh on a core mix moving downstream on a conveyor, wherein the plate vibrates at a rate that assists in ...

Process of purifying gypsum - Metallgesellschaft ...

1991-10-29 · The process for purifying gypsum suspensions, particularly those formed in a flue gas desulfurizing plant, includes feeding the gypsum suspension (9) to a first hydrocyclone (1), which is operated to produce an underflow (11) with a comparatively high underflow concentration and an overflow fed to a collecting tank (2).

US Patent for Device for drying and/or calcining gypsum ...

A gypsum dryer/calciner (1) includes a calcining space (2), a first pipe (4) exhibiting an inlet connected to a source of hot gases (3) and an outlet emerging in the calcining space (2); a second pipe (5) exhibiting an inlet connected to a source of gypsum (8) and an outlet emerging in the calcining space, the second pipe being concentric with the first pipe; a force-feeding screw (6 ...

Process for converting FGD gypsum to ... - patents.justia

A continuous countercurrent flow process for converting FGD gypsum to ammonium sulfate and calcium carbonate including countercurrent flows with internal recycle of ...

Plant Design CaSO4.2H2O (Gypsum) From CaCO3 and

2017-10-16 · The process of making gypsum from rock is by destroying the rocks gypsum obtained from mountain areas. Destruction of this ... Limestone Sulfuric Acid Water Gypsum Carbon Dioxide (US Patent 6.613.141 B2) Plant Design CaSO4.2H2O (Gypsum) From CaCO3 and H2SO4 9 With Capacity 100.000 Ton/Year Lateefee yangok ...

Search for patents | USPTO

Inventors are encouraged to search the USPTO's patent database to see if a patent has already been filed or granted that is similar to your patent. Patents may be searched in the USPTO Patent Full-Text and Image Database (PatFT). The USPTO houses full text for patents issued from 1976 to the present and PDF images for all patents from 1790 to ...

US Patent for Process for preparing calcium sulphate ...

1993-6-28 · A simple process for preparing acicular calcium sulphate dihydrate is provided in which a slurry of calcium carbonate containing 100 to 800 grams per liter calcium carbonate is mixed with a solution of sulphuric acid containing 80 to 500 grams per liter sulphuric acid in proportions which produce a calcium sulphate slurry having a pH from 0.5 to 1.5.

Process for Obtaining a Utility Patent | USPTO

Patent Center. Try the beta replacement for EFS-Web, Private PAIR and Public PAIR. Check application status. Check patent application status with public PAIR and private PAIR. Fees and payment. Pay maintenance fees and learn more about filing fees and other payments. Patent Trial & Appeal Board. Resolve disputes regarding patents with PTAB ...

Paper covered gypsum board and process of manufacture ...

Paper covered gypsum board and process of manufacture. United States Patent 4020237. Abstract: A paper covered gypsum board and a process for its manufacture, with at least one cover of the board comprising a multiply paper sheet containing a major proportion of cellulosic fibers and a minor proportion of short mineral fibers. Inventors:

Process monitor for gypsum board manufacturing - Patent ...

Contact us; Contact us. ... Recent Activity Export List Clipboard Export Process monitor for gypsum board manufacturing (PAT - US6045730) ' ' POTTER JOSEPH T Patent: United STATES Patent - United States. Application: US19980025315 on 1998-02-18. Publication: 2000-04-04. Abstract. The temperature and/or moisture profile over time of gypsum ...

Process for waterproofing gypsum materials - Patent ...

1996-2-22 · The invention provides a process for water-proofing gypsum materials which comprises adding, to a pulverulent gypsum plaster composition containing from 10 to 90% by weight of gypsum based on the total weight of the composition, a mixture of a) from 1.0 to 15% by weight, based on the total weight of the composition, of one or more dispersion powders redispersible in water and based

Process for the degradation of waste gypsum and

In a process for the degradation of waste gypsum, with simultaneous production of calcium hydroxide, the gypsum is made up to give a suspension for the biological degradation, the suspension is furnished with substrate and inoculated with sulphate-degrading bacteria.

Retarder for gypsum plaster and a process for retarding ...

A process for retarding the setting of a gypsum plaster composition which comprises incorporating in said gypsum plaster composition an effective amount of a retarder selected from the group consisting of β-hydroxy-β-carboxy-isocaproic acid and a water soluble salt thereof.

Patent process overview | USPTO

Utility patents may be granted to anyone who invents or discovers any new and useful process, machine, article of manufacture, or compositions of matters, or any new useful improvement thereof. By far, most patent applications filed at the USPTO are utility applications. Applying for a Utility Patent.

Patent a Process in the US: A Complete Guide

2019-9-17 · The US Patent Law allows one to improve on existing technology. However, It should serve the purpose of genuinely improving the current technology by reducing the time, or improving efficiency, etc. As we can see, the USPTO allows you to patent a process. The validity of the patent

Understanding the patent examination process

2020-9-1 · 1. Statutory double patenting (1 invention=1 patent) 2. Inventorship(proper inventor(s) named) 3. Eligibility a) Falls within one of the four categories of patent-eligible (statutory) subject matter - process, machine, article of manufacture, or composition of matter (or

Can You Patent a Process: Everything You Need to Know

2020-6-24 · A process patent is a form of utility patent that covers methods of changing the functionality or characteristics of a material during a particular use. The patent-holder is granted exclusive protections and rights to that process for 20 years. When one patents a business method or, in some cases, a computer program, this is a form of patenting ...

US Patent, Patent Application and Patent Search - Justia ...

Browse Patents by US Classification. Apparel (Class 2) Baths, closets, sinks, and spittoons (Class 4) Beds (Class 5) Compound tools (Class 7) Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers (Class 8) Boot and shoe

<< Previous:Used Treadmill For Sale In Uae
>> Next:Crushing Plant Barite For Sale Jaw Crusher Plant

QUALITY SERVICE

Pre-sale service

Shuttle bus

Factory visit

Business tourism

Conference reception

Sale service

On-the-spot investigation

Conceptual design

Detailed quotation

Sign a contract

After-sale service

Packaging delivery

Installation and debugging

Operation training

Regular visit

1.Liming Heavy Industry, a professional manufacturer, can provide perfect quality assurance system for the products.
2.The flexible payment method can help you relieve project stress.
3.Short stocking period and quick delivery speed can reduce project preparation cycle.
4.There are many transportation ways including sea transportation, air transportation, land transportation, which can make your product reach destination quickly.
5.There is a quick response to your problem. And technicians will provide professional assistance at any time.

Copyright © 2004-2015 by China Liming Heavy Industry Science and Technology Co. LTD All rights reserved Industry News Products