Patent US2601397A successfully refreshed from Google Patents.
US2601397A
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US
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Rotary fluid displacement device
Assignee: Individual
•
Filing: 1950-04-11
•
Granted: 1952-06-24
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Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Hill Myron Francis
- 👤 Francis A Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:52
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/10; F01C1/103; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/19972
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) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |