Patent US5571196A successfully refreshed from Google Patents.
US3333980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organophilic and hydrophobic particles and method for their preparation
Assignee: Unifrax I LLC
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Filing: 1964-01-08
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Granted: 1967-08-01
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Expires: 1984-01-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew T Mccord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:32
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/006; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09C3/06; C09C3/063; C09C3/08; C09C3/10; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
THE METHOD OF TREATING FINELY DIVIDED DISCRETE PARTICLES WHICH ARE INSOLUBLE IN WATER BUT WHICH PRODUCE A PH OF 7 OR LESS IN WATER, IN ORDER TO IMPART HYDROPHOBIC AND ORGANOPHILIC PROPERTIES THERETO, SAID METHOD COMPRISING, PRODUCING AN ALKALINE SURFACE ON EACH OF SAID PARTICLES BY FORMING AN AQUEOUS SLURRY OF SAID PARTICLES IN A HYDROLYZABLE POLYVALENT METALLIC SALT SOLUTION AND BY ALKALIZING SAID SLURRY BEYOND 7 PH WITH A WATER SOLUBLE BASE TO PRECIPITATE A POLYVALENT METALLIC HYDRATE CONTAINING ADSORBED BASE ON AND AROUND SAID PARTICLES, AND THEN NEUTRALIZING SAID SURFACE WHILE IN SAID SLURRY WITH FATTY ACID, SAID HYDRATE, CALCULATED AS OXIDE, RANGING FROM ABOUT 0.05% TO ABOUT 2.0% BY WEIGHT OF SAID PARTICLES AND SAID FATTY ACID RANGING FROM THE STOICHIOMETRIC AMOUNT REQUIRED TO NEUTRALIZE SAID ADSORBED HAVE TO ABOUT 200% BY WEIGHT OF SAID HYDRATE, CALCULATED AS OXIDE.
Claim 2
Independent Claim
142 words
THE METHOD OF TREATING FINELY DIVIDED DISCRETE PARTICLES WHICH ARE INSOLUBLE IN WATER BUT WHICH PRODUCE A PH OF 7 OR LESS IN WATER, IN ORDER TO IMPART HYDROPHOBIC AND ORGANOPHILIC PROPERTIES THERETO, SAID METHOD COMPRISING, PRODUCING AN ALKALINE SURFACE ON EACH OF SAID PARTICLES BY FORMING AN AQUEOUS SLURRY OF SAID PARTICLES IN A HYDROLYZABLE POLYVALENT METALLIC SALT SOLUTION AND BY ALKALIZING SAID SLURRY BEYOND 7 PH WITH A WATER SOLUBLE BASE TO PRECIPITATE A POLYVALENT METALLIC HYDRATE CONTAINING ADSORBED BASE ON AND AROUND SAID PARTICLES, AND THEN NEUTRALIZING SAID SURFACE WHILE IN SAID SLURRY WITH FATTY ACID, SAID HYDRATE, CALCULATED AS OXIDE, RANGING FROM ABOUT 0.05% TO ABOUT 2.0% BY WEIGHT OF SAID PARTICLES AND SAID FATTY ACID RANGING FROM THE STOICHIOMETRIC AMOUNT REQUIRED TO NEUTRALIZE SAID ADSORBED HAVE TO ABOUT 200% BY WEIGHT OF SAID HYDRATE, CALCULATED AS OXIDE.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |