Patent US1832257A successfully refreshed from Google Patents.
US1832257A
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Pump
Assignee: STEPHENS PUMP Co
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Filing: 1929-05-15
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Granted: 1931-11-17
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Expires: 1949-05-15
Abstract
No abstract record available.
Inventors
- 👤 Charles D Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/086; F04B43/0009; F04B43/0054; F04B43/0072; F04B43/10; F04B43/107
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) | 1934-11-16 | 1935-05-18 | 1935-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-16 | 1939-05-18 | 1939-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-16 | 1943-05-18 | 1943-11-17 | $7700.00 | Window Closed / Lapsed |