Patent US3661831A successfully refreshed from Google Patents.
US3661831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrafluoroethylene/hexafluoropropylene copolymer particles dispersed in organic liquids
Assignee: EIDP Inc
•
Filing: 1970-07-01
•
Granted: 1972-05-09
•
Expires: 1990-07-01
Abstract
Abstract DISPERSIONS OF TETRAFLUOROETHYLENE/HEXAFLUOROPROPYLENE COPOLYMERS IN ORGANIC LIQUIDS, CONTAINING OTHER FILM-FORMING MATERIALS, AND ARTICLES COATED WITH THESE DISPERSIONS.
Inventors
- 👤 James C Fang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C09D127/20; C09D179/00; C09D179/04; C09D179/08; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |