US2669937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating pump
Assignee: Individual
•
Filing: 1950-11-08
•
Granted: 1954-02-23
•
Expires: 1970-11-08
Abstract
No abstract record available.
Inventors
- 👤 Presentey Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/04; H; H02; H02K; H02K33/00; H02K33/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US458873A
Cited
US507946A
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US519662A
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US520810A
Cited
US1380442A
Cited
US1737387A
Cited
US1713073A
Cited
DE585298C
Cited
US2435003A
Cited
US2558329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |