US2881142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetrafluoroethylene aqueous paste and process for shaping same
Assignee: EIDP Inc
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Filing: 1954-09-08
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Granted: 1959-04-07
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Expires: 1974-09-08
Abstract
No abstract record available.
Inventors
- 👤 Eldridge John Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:06
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A COMPOSITION COMPRISING A COAGULUM OF TETRAFLUOROETHYLENE POLYMER PARTICLES OF COLLOIDAL SIZE AND FROM 5 TO 40% BY WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER OF A LUBRICANT HAVING A CAPACITY TO WET POLYTETRAFLUOROETHYLENE, SAID LUBRICANT BEING COMPOSED OF WATER AND AT LEAST ONE ORGANIC ADDITIVE INCLUDING FROM 0.1 TO 10% BY WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER OF A POLYMERIC WATER-SOLUBLE ORGANIC THICKENER THEREFOR, SAID LUBRICANT BEING INTERSPERSED IN SAID COAGULUM, SAID POLYMERIC THICKENER BEING A MEMBER OF THE CLASS CONSISTING OF METHYL CELLULOSE ETHER, POLYVINYL ALCOHOL, AND SODIUM CARBOXYMETHYL CELLULOSE.
Claim 2
Dependent Claim
89 words
A COMPOSITION COMPRISING A COAGULUM OF TETRAFLUOROETHYLENE POLYMER PARTICLES OF COLLOIDAL SIZE AND FROM 5 TO 40% BY WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER OF A LUBRICANT HAVING A CAPACITY TO WET POLYTETRAFLUOROETHYLENE, SAID LUBRICANT BEING COMPOSED OF WATER AND AT LEAST ONE ORGANIC ADDITIVE INCLUDING FROM 0.1 TO 10% BY WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER OF A POLYMERIC WATER-SOLUBLE ORGANIC THICKENER THEREFOR, SAID LUBRICANT BEING INTERSPERSED IN SAID COAGULUM, SAID POLYMERIC THICKENER BEING A MEMBER OF THE CLASS CONSISTING OF METHYL CELLULOSE ETHER, POLYVINYL ALCOHOL, AND SODIUM CARBOXYMETHYL CELLULOSE.
References Cited (Backward Citations)
US2478229A
Cited
US2681324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |