US3063222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter apparatus
Assignee: American Air Filter Co Inc
•
Filing: 1960-08-25
•
Granted: 1962-11-13
•
Expires: 1980-08-25
Abstract
No abstract record available.
Inventors
- 👤 Willem J Hagendoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB700352A
Cited
US2763139A
Cited
US2807330A
Cited
US2850113A
Cited
US2963112A
Cited
US2869680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |