US3513982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement
Assignee: Eastman Kodak Co
•
Filing: 1967-05-01
•
Granted: 1970-05-26
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Carter
- 👤 Donald M Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1193335A
Cited
US1495825A
Cited
US1966274A
Cited
US2908347A
Cited
US3076555A
Cited
GB851247A
Cited
US3002870A
Cited
US3133847A
Cited
US3293830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |