US2748716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible rotary pump
Assignee: Ridge Tool Co
•
Filing: 1952-01-30
•
Granted: 1956-06-05
•
Expires: 1972-01-30
Abstract
No abstract record available.
Inventors
- 👤 Anton J Janik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:25
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |