Patent US3202626A successfully refreshed from Google Patents.
US3202626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polytetrafluoroethylene dispersions and solid products
Assignee: Individual
•
Filing: 1961-12-28
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Granted: 1965-08-24
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Vincent G Fitzsimmons
- 👤 William A Zisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN AQUEOUS AMMONIACAL THIXOTROPIC GEL DISPERSION OF PH IN THE RANGE OF FROM ABOVE 7 UP TO 8 OF POLYTETRAFLUOROETHYLENE AND COLLOIDAL BOEHMITE ALUMINA FIBRILS WHICH BEAR ADSORBED ACETATE IONS IN AMOUNT CORRESPONDING TO FROM ABOUT 8 TO 11% BY WEIGHT ACETIC ACID THEREON, SAID COLLOIDAL ALUMINA FIBRILS BEARING ADSORBED ACETATE IONS BEING PRESENT IN A PROPORTION OF FROM ABOUT 0.1 TO 5% BY WEIGHT ON THE POLYTETRAFLUOROETHYLENE.
Claim 2
Dependent Claim
68 words
AN AQUEOUS AMMONIACAL THIXOTROPIC GEL DISPERSION OF PH IN THE RANGE OF FROM ABOVE 7 UP TO 8 OF POLYTETRAFLUOROETHYLENE AND COLLOIDAL BOEHMITE ALUMINA FIBRILS WHICH BEAR ADSORBED ACETATE IONS IN AMOUNT CORRESPONDING TO FROM ABOUT 8 TO 11% BY WEIGHT ACETIC ACID THEREON, SAID COLLOIDAL ALUMINA FIBRILS BEARING ADSORBED ACETATE IONS BEING PRESENT IN A PROPORTION OF FROM ABOUT 0.1 TO 5% BY WEIGHT ON THE POLYTETRAFLUOROETHYLENE.
References Cited (Backward Citations)
US2961712A
Cited
US2915475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |