US2910138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: —
•
Filing: —
•
Granted: 1959-10-27
•
Expires: 1976-10-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D45/00; B01D45/12; B01D45/14; B01D45/16; B01D47/06; B01D50/00; B01D50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1961956A
Cited
US1243214A
Cited
US1754126A
Cited
US1948278A
Cited
US2192332A
Cited
US2586692A
Cited
US2565596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |