US3392846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter assembly
Assignee: American Air Filter Co Inc
•
Filing: 1964-10-01
•
Granted: 1968-07-16
•
Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Allan R Getzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:18
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/23; B01D29/232; B01D46/0002; B01D46/10; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125427A
Cited
US2058669A
Cited
GB482543A
Cited
US2138874A
Cited
US2423741A
Cited
US2989145A
Cited
US3222850A
Cited
US3183286A
Cited
US3246457A
Cited
US3144315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |