US2422901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Individual
•
Filing: 1941-07-05
•
Granted: 1947-06-24
•
Expires: 1961-07-05
Abstract
No abstract record available.
Inventors
- 👤 George D Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
F; F16; F16N; F16N13/00; F16N13/20; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F03; F03C; F03C2/00; F03C2/30; F04; F04C; F04C11/00; F04C11/005; F04C11/006; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3441; F04C2/3442; F04D; F04D3/00; Y; Y10; Y10S; Y10S415/00; Y10S415/913
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) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |