Patent US1396494A successfully refreshed from Google Patents.
US1396494A
Expired / Lapsed
US
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Air-pump
Assignee: Individual
•
Filing: 1920-04-05
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Granted: 1921-11-08
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Expires: 1940-04-05
Abstract
No abstract record available.
Inventors
- 👤 Wright Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:48
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/08; B05B9/0805; B05B9/0811; B05B9/0816; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-11-07 | 1925-05-09 | 1925-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-07 | 1929-05-09 | 1929-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-07 | 1933-05-09 | 1933-11-08 | $7700.00 | Window Closed / Lapsed |