US 2011/0011311 A1Published application

Calcium sulfate hemihydrate treatment process

AssigneeThe Nugyp Corp.

InventorsRobert Byron Bruce, Mark Richard Flumiani, Charles E. Blow

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Abstract

A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.

Claims20

Dependent claims

A process for treating beta calcium sulfate hemihydrate comprising:

a. exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.

Dependencies are inferred from the claim text.

Facts

Application: 12/890,242Filed 24 Sep 2010
Priority: 20 Dec 2006
Published: 20 Jan 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C04B 11/0282
Kettles; Marmites; Autoclaves: autoclaves, e.g. using chariots
C04B 11/007
Calcium sulfate cements: after-treatment of the dehydration products, e.g. aging, stabilisation
C04B 28/147
Calcium sulfate hemi-hydrate with a specific crystal form: beta-hemihydrate
C04B 2111/0062
As one or more layers of a layered structure: gypsum-paper board like materials

Family

Application60/871,039Us provisional application · filed 20 Dec 2006
Application11/957,667Continuation · filed 17 Dec 2007
Application12/890,242Continuation
US 2008/0148998 A1Published application
US 7,824,490 B2Related patent
US 8,282,731 B2Related patent
US 2011/0011311 A1This patent

From the US filing history. Foreign family members aren’t listed.

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