US2991930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor having a variable discharge cut-off point
Assignee: Worthington Corp
•
Filing: 1957-09-16
•
Granted: 1961-07-11
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert E Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR495128A
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FR22401E
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FR22408E
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US1482807A
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US1547324A
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GB339021A
Cited
US2426491A
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FR998450A
Cited
US2606503A
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FR1066760A
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US2658344A
Cited
US2938663A
Cited
US2921535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |