US3170408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pumps
Assignee: Waterous Co
•
Filing: 1962-07-16
•
Granted: 1965-02-23
•
Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hill
- 👤 Howard M Tomasko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:40
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C15/0026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1487567A
Cited
US1620261A
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US1795579A
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US2247454A
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US2823616A
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US2640430A
Cited
US2764101A
Cited
US2848952A
Cited
US2779532A
Cited
US2997960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |