Patent US4169796A successfully refreshed from Google Patents.
US4169796A
Expired / Lapsed
US
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Processing of dicalcium phosphate and sodium montmorillonite
Assignee: MAVIRO Co Ltd BRITISH WEST INDIES A CORP
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Filing: 1978-02-01
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Granted: 1979-10-02
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Expires: 1998-02-01
Abstract
Abstract A process for forming a dispersion of dicalcium phosphate in montmorillonite clay comprising mixing sodium montmorillonite with dicalcium phosphate and some water, and subjecting the mixture to dry heat.
Inventors
- 👤 Clarence W. Dahlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K47/00; A61K47/02; A61K8/24; A61K9/00; A61K9/0012; A61K9/0014; A61Q; A61Q11/00; A61Q11/02; A61Q9/00; A61Q9/02; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/327; C01B33/00; C01B33/20; C01B33/26; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/1253; Y; Y10; Y10S; Y10S159/00; Y10S159/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
A process for forming a dispersion of dicalcium phosphate in sodium montmorillonite clay comprising: mixing two parts sodium montmorillonite clay with 1.5 parts dicalcium phosphate and not less than 2.73% distilled demineralized water by weight; and subjecting the mixture to dry heat in the vicinity of 300° F. until it no longer contains any water.
Claim 2
Dependent Claim
55 words
A process for forming a dispersion of dicalcium phosphate in sodium montmorillonite clay comprising: mixing two parts sodium montmorillonite clay with 1.5 parts dicalcium phosphate and not less than 2.73% distilled demineralized water by weight; and subjecting the mixture to dry heat in the vicinity of 300° F. until it no longer contains any water.
Claim 3
Dependent Claim
66 words
The process of comminuting and forming a liquid suspension of dicalcium phosphate comprising: (a) mixing two parts sodium montmorillonite clay with 1.5 parts dicalcium phosphate and not less than 2.73% distilled demineralized water by weight; (b) subjecting the mixture to dry heat in the vicinity of 300° F. until it no longer contains any water; and (c) mixing the product resulting from step b in liquid.
Claim 4
Dependent Claim
66 words
The process of comminuting and forming a liquid suspension of dicalcium phosphate comprising: (a) mixing two parts sodium montmorillonite clay with 1.5 parts dicalcium phosphate and not less than 2.73% distilled demineralized water by weight; (b) subjecting the mixture to dry heat in the vicinity of 300° F. until it no longer contains any water; and (c) mixing the product resulting from step b in liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |