US3437263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw rotor machines
Assignee: Atlas Copco AB
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Filing: 1966-06-22
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Granted: 1969-04-08
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Expires: 1986-06-22
Abstract
No abstract record available.
Inventors
- 👤 Jan Edvard Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16; F01; F01C; F01C1/00; F01C1/08; F01C1/12; F01C1/14; F01C1/16; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23015E
Cited
US2425000A
Cited
US2457314A
Cited
US2804260A
Cited
US2999466A
Cited
US3161349A
Cited
US3209990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |