US2801791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor
Assignee: Worthington Corp
•
Filing: 1953-07-14
•
Granted: 1957-08-06
•
Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 Walter Hellmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02; F04C29/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1635006A
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US1964492A
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US2050533A
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US2324903A
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US2455297A
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US2400286A
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US2522824A
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US2639855A
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US2633292A
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US2641405A
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GB653295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |