US2612484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric tetrafluoroethylene dispersions
Assignee: EIDP Inc
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Filing: 1949-07-27
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Granted: 1952-09-30
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Expires: 1969-07-27
Abstract
No abstract record available.
Inventors
- 👤 Bankoff Seymour George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A POLYMERIZATION OF MONOMERIC TETRAFLUOROETHYLENE DISSOLVED IN AN AQUEOUS MEDIUM TO OBTAIN A COLLOIDAL DISPERSION OF POLYMERIC TETRAFLUOROETHYLENE, THE STEP OF CARRYING OUT SAID POLYMERIZATION AT A TEMPERATURE OF 0*C. TO 100* C. IN THE PRESENCE OF A WATER-SOLUBLE PEROXY POLYMERIZATION CATALYST AND IN THE PRESENCE OF 0.1%-12%, BY WEIGHT OF SAID AQUEOUS MEDIUM, OF A SATURATED HYDROCARBON HAVING MORE THAN 12 CARBON ATOMS AND WHICH IS LIQUID UNDER THE POLYMERIZATION CONDITIONS.
Claim 2
Dependent Claim
73 words
IN A POLYMERIZATION OF MONOMERIC TETRAFLUOROETHYLENE DISSOLVED IN AN AQUEOUS MEDIUM TO OBTAIN A COLLOIDAL DISPERSION OF POLYMERIC TETRAFLUOROETHYLENE, THE STEP OF CARRYING OUT SAID POLYMERIZATION AT A TEMPERATURE OF 0*C. TO 100* C. IN THE PRESENCE OF A WATER-SOLUBLE PEROXY POLYMERIZATION CATALYST AND IN THE PRESENCE OF 0.1%-12%, BY WEIGHT OF SAID AQUEOUS MEDIUM, OF A SATURATED HYDROCARBON HAVING MORE THAN 12 CARBON ATOMS AND WHICH IS LIQUID UNDER THE POLYMERIZATION CONDITIONS.
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |