Patent US1957435A successfully refreshed from Google Patents.
US1957435A
Expired / Lapsed
US
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Pumping mechanism
Assignee: Siemens and Halske AG
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Filing: 1929-11-12
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Granted: 1934-05-08
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Expires: 1949-11-12
Abstract
No abstract record available.
Inventors
- 👤 Baur Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:29
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/20; F02M59/24; F02M59/26; F02M59/02; F02M59/04; F02M59/06; F02M59/30; F02M2700/00; F02M2700/13; F02M2700/1317; F02M2700/1388
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) | 1937-05-07 | 1937-11-06 | 1938-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-07 | 1941-11-06 | 1942-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-07 | 1945-11-06 | 1946-05-08 | $7700.00 | Window Closed / Lapsed |