US2714858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressors or pumps, in combination with hydraulic controls, and mechanical controls in co-ordination therewith
Assignee: Individual
•
Filing: 1950-11-03
•
Granted: 1955-08-09
•
Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 Kepka Frank
- 👤 Jean A H Barkeij
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:35
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0836; F01C21/0854
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) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |