US2853154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket-type air filters
Assignee: American Air Filter Co Inc
•
Filing: 1956-08-27
•
Granted: 1958-09-23
•
Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Richard D Rivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/023; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR575846A
Cited
US1821202A
Cited
US1924249A
Cited
US2237499A
Cited
US2774443A
Cited
FR1083663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |