US2938663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressors
Assignee: Borsig GmbH
•
Filing: 1955-10-25
•
Granted: 1960-05-31
•
Expires: 1975-10-25
Abstract
No abstract record available.
Inventors
- 👤 Luck Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23086E
Cited
US1482807A
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US2011338A
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CH152671A
Cited
CH160003A
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GB394985A
Cited
US2371922A
Cited
US2426491A
Cited
US2509321A
Cited
US2630759A
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US2658344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |