Patent US2650754A successfully refreshed from Google Patents.
US2650754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor
Assignee: RONNOCO EXP DEV Co Ltd
•
Filing: 1950-02-21
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Granted: 1953-09-01
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Expires: 1970-02-21
Abstract
No abstract record available.
Inventors
- 👤 Simon Hans Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2256459A
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US2327849A
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US2387761A
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US2460814A
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US2476041A
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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) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |