Patent US3418302A successfully refreshed from Google Patents.
US3418302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluorocyclic ether polymers
Assignee: EIDP Inc
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Filing: 1963-08-30
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Granted: 1968-12-24
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Darby Robert Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:13
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A SUBSTANTIALLY SATURATED SOLID THERMOPLASTIC POLYMER OF PERFLUORODIMETHYLENE-BIS (PERFLUOROVINYL ETHER) CONTAINING STRUCTURES OF THE CLASS CONSISTING OF:
Claim 2
Dependent Claim
17 words
A SUBSTANTIALLY SATURATED SOLID THERMOPLASTIC POLYMER OF PERFLUORODIMETHYLENE-BIS (PERFLUOROVINYL ETHER) CONTAINING STRUCTURES OF THE CLASS CONSISTING OF:
References Cited (Backward Citations)
US3162622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |