Patent US2493849A successfully refreshed from Google Patents.
US2493849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: Individual
•
Filing: 1945-05-15
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Granted: 1950-01-10
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Expires: 1965-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Agnew H Bahnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26; B01D46/0052; B01D46/0056; B01D46/66; B01D46/68; B01D46/681
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US360129A
Cited
US399713A
Cited
US796434A
Cited
US1444092A
Cited
FR740118A
Cited
US2169435A
Cited
US2178463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |