US3274011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay products and aqueous systems containing same
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1963-10-04
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Granted: 1966-09-20
•
Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 James B Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:31
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/131
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD FOR REDUCING THE HIGH SHEAR VISCOSITY OF KAOLINITE WHICH CONSISTS ESSENTIALLY OF: FORMING A SLURRY CONSISTING ESSENTIALLY OF A KAOLINITE AND AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID HAVING A CONCENTRATION LESS THAN 1 PERCENT, SAID SLURRY CONTAINING ABOUT 5 TO 40 POUNDS HF PER TON OF SAID KAOLINITE, AGITATING SAID SLURRY, SEPARATING THE KAOLINITE FROM THE AQUEOUS PHASE AND WASHING THE KAOLINITE TO ELIMINATE FREE ACID.
Claim 2
Independent Claim
68 words
A METHOD FOR REDUCING THE HIGH SHEAR VISCOSITY OF KAOLINITE WHICH CONSISTS ESSENTIALLY OF: FORMING A SLURRY CONSISTING ESSENTIALLY OF A KAOLINITE AND AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID HAVING A CONCENTRATION LESS THAN 1 PERCENT, SAID SLURRY CONTAINING ABOUT 5 TO 40 POUNDS HF PER TON OF SAID KAOLINITE, AGITATING SAID SLURRY, SEPARATING THE KAOLINITE FROM THE AQUEOUS PHASE AND WASHING THE KAOLINITE TO ELIMINATE FREE ACID.
References Cited (Backward Citations)
GB272976A
Cited
US2440601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |