Patent US3676181A successfully refreshed from Google Patents.
US3676181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge treatment of tetrafluoroethylene/hexafluoropropylene copolymer in acetone
Assignee: EIDP Inc
•
Filing: 1969-09-16
•
Granted: 1972-07-11
•
Expires: 1989-09-16
Abstract
Abstract TREATMENT OF TETRAFLUOROETHYLENE/HEXAFLUOROPROPYLENE COPOLYMER SURFACE BY ELECTRICAL DISCHARGE IN AN ATMOSPHERE CONTAINING 3 TO 40% BY VOLUME OF ACETONE TO RENDER THE SURFACE MORE ADHERABLE TO ANOTHER MATERIAL.
Inventors
- 👤 Alexander Joseph Kowalewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |