US1734600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valveless rotary pump
Assignee: A L SMITH IRON WORKS
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Filing: 1929-03-28
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Granted: 1929-11-05
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Expires: 1949-03-28
Abstract
No abstract record available.
Inventors
- 👤 Ephriam J Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B1/00; F04B1/04; F04B1/0404; F04B1/0426; F04B1/06; F04B1/07; F04B1/10; F04B1/113; F04B1/1133; F04B49/00; F04B49/12; F04B49/123; F04B49/128
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) | 1932-11-04 | 1933-05-06 | 1933-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-04 | 1937-05-06 | 1937-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-04 | 1941-05-06 | 1941-11-05 | $7700.00 | Window Closed / Lapsed |