Patent US3414189A successfully refreshed from Google Patents.
US3414189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw rotor machines and profiles
Assignee: Atlas Copco AB
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Filing: 1966-06-22
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Granted: 1968-12-03
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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
2026-11-07 22:00
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/12; F01C1/14; F01C1/16; F01C1/082; F01C1/084; F04; F04C; F04C18/00; F04C18/08; F04C18/082; F04C18/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477002A
Cited
US2457314A
Cited
US2473234A
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US2486770A
Cited
US2622787A
Cited
CH324301A
Cited
US2922377A
Cited
US3314598A
Cited
US3245612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |