Patent US2900839A successfully refreshed from Google Patents.
US2900839A
Expired / Lapsed
US
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Variable throw radial pump
Assignee: Individual
•
Filing: 1954-01-26
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Granted: 1959-08-25
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Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 Donald D R Mackintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:40
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/22; F16C3/28; F04; F04B; F04B1/00; F04B1/04; F04B1/053; F04B1/06; F04B1/07; F04B49/00; F04B49/12; F04B49/123; F04B49/125; F04B49/126; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2111; Y10T74/2112
Claims Analysis
Total Claims: 0
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |