US2650544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump assembly
Assignee: Individual
•
Filing: 1949-05-17
•
Granted: 1953-09-01
•
Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 John B Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:56
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB145501A
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US1590384A
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US1486837A
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US1970146A
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US1709580A
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US1694805A
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US1879136A
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US2243874A
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US2324903A
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US2405061A
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US2434135A
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US2383153A
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US2389728A
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US2428181A
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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) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |