US2630759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume rotary pump
Assignee: Individual
•
Filing: 1949-10-22
•
Granted: 1953-03-10
•
Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Mahlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1913128A
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US2139373A
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US2232983A
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US2380783A
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US2309803A
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US2405061A
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US2434135A
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US2446730A
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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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |