US2771155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter latch
Assignee: American Air Filter Co Inc
•
Filing: 1953-12-14
•
Granted: 1956-11-20
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Palmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:49
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/06; Y; Y10; Y10S; Y10S55/00; Y10S55/31; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR525241A
Cited
US1788171A
Cited
US1745260A
Cited
US1928734A
Cited
US2589878A
Cited
US7596438B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |