US1821082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Stewart Warner Corp
•
Filing: 1929-02-07
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Granted: 1931-09-01
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Expires: 1949-02-07
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/11; B01D29/13; B01D29/23; B01D29/232; B01D29/237; B01D29/96; B01D2201/00; B01D2201/28; B01D2201/287; B01D35/00; B01D35/14; B01D35/147
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |