Patent US3264508A successfully refreshed from Google Patents.
Patent US1957307A successfully refreshed from Google Patents.
US1957307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan construction
Assignee: Safety Car Heating and Lighting Co
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Filing: 1930-08-07
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Granted: 1934-05-01
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Expires: 1950-08-07
Abstract
No abstract record available.
Inventors
- 👤 Ohlsen Louis H Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:26
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/10
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) | 1937-04-30 | 1937-10-30 | 1938-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-30 | 1941-10-30 | 1942-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-30 | 1945-10-30 | 1946-05-01 | $7700.00 | Window Closed / Lapsed |