Patent US6801520B2 successfully refreshed from Google Patents.
US2610951A
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Method of heat-treating a swellable bentonite to increase its thickening power
Assignee: Vanderbilt Chemicals LLC
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Filing: 1950-08-17
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Granted: 1952-09-16
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Expires: 1970-08-17
Abstract
No abstract record available.
Inventors
- 👤 Francis E Hutchins
- 👤 Cleo J Golding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:44
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K47/00; A61K47/02; A61Q; A61Q19/00; C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/40; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C10; C10M; C10M5/00; C01P; C01P2004/00; C01P2004/20; C01P2004/80; C01P2006/00; C01P2006/22; C01P2006/80; C01P2006/82; C10M2201/00; C10M2201/02; C10M2201/10; C10M2201/102; C10M2201/103; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR INCREASING THE THICKENING POWER OF A SWELLABLE BENTONITE WHEN INCORPORATED INTO AQUEOUS DISPERSIONS, THE SAID METHOD COMPRISING MAINTAINING THE BENTONITE IN FLAKE OR POWDER FORM AT A TEMPERATURE OF AT LEAST ABOUT 40* C. AND NOT MORE THAN ABOUT 100* C. FOR A PERIOD OF AT LEAST ONE WEAK WHILE THE BENTONITE CONTAINS ABSORBED WATER.
Claim 2
Dependent Claim
58 words
A PROCESS FOR INCREASING THE THICKENING POWER OF A SWELLABLE BENTONITE WHEN INCORPORATED INTO AQUEOUS DISPERSIONS, THE SAID METHOD COMPRISING MAINTAINING THE BENTONITE IN FLAKE OR POWDER FORM AT A TEMPERATURE OF AT LEAST ABOUT 40* C. AND NOT MORE THAN ABOUT 100* C. FOR A PERIOD OF AT LEAST ONE WEAK WHILE THE BENTONITE CONTAINS ABSORBED WATER.
References Cited (Backward Citations)
US1907690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |