Patent US3414878A successfully refreshed from Google Patents.
Patent US3460683A successfully refreshed from Google Patents.
US3460683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate membranes
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1966-08-22
•
Granted: 1969-08-12
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Charles R Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:52
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/08; B01D71/12; B01D71/14; B01D71/16; B01D2323/00; B01D2323/15; B01D2323/20; B01D61/00; B01D61/02; B01D61/025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |