US2635545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual pump
Assignee: Individual
•
Filing: 1948-08-19
•
Granted: 1953-04-21
•
Expires: 1968-08-19
Abstract
No abstract record available.
Inventors
- 👤 Walter A Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:00
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/04; F02B; F02B77/00; F02B77/14; F02M37/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1694279A
Cited
US1840527A
Cited
US1883459A
Cited
US2018153A
Cited
US1982966A
Cited
US2289651A
Cited
US2289617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |