US1742919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magazine filter
Assignee: Stewart Warner Corp
•
Filing: 1926-06-19
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Granted: 1930-01-07
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Expires: 1946-06-19
Abstract
No abstract record available.
Inventors
- 👤 Fred W Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:29
CPC Classifications
B; B01; B01D; 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) | 1933-01-06 | 1933-07-08 | 1934-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-01-06 | 1937-07-08 | 1938-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-01-06 | 1941-07-08 | 1942-01-07 | $7700.00 | Window Closed / Lapsed |