US2780406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor
Assignee: Worthington Corp
•
Filing: 1953-04-21
•
Granted: 1957-02-05
•
Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Harry A Feldbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE625607C
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US2126279A
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US2185338A
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US2477002A
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US2498972A
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US2521270A
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US2641405A
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US2691482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |