US2809779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor or motor
Assignee: Individual
•
Filing: 1956-02-23
•
Granted: 1957-10-15
•
Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 William L W Girvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/0207; F01C1/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US801182A
Cited
US1041721A
Cited
US1700038A
Cited
GB367086A
Cited
US2112890A
Cited
US2324168A
Cited
FR980737A
Cited
US2475247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |