US3478141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating film-fibril sheets
Assignee: EIDP Inc
•
Filing: 1966-08-29
•
Granted: 1969-11-11
•
Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 James Joseph Dempsey
- 👤 Chi-Chang Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/07; D; D04; D04H; D04H13/00; B31F2201/00; B31F2201/07; B31F2201/0707; B31F2201/0715; B31F2201/0723; B31F2201/0725; B31F2201/0728; B31F2201/073; B31F2201/0733; B31F2201/0738; B31F2201/0756; B31F2201/0784; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1983464A
Cited
US2464301A
Cited
US2890700A
Cited
US3150416A
Cited
US3169899A
Cited
US3255064A
Cited
GB950262A
Cited
US3286007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |