US2871831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal gear machines
Assignee: —
•
Filing: —
•
Granted: 1959-02-03
•
Expires: 1976-02-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/103; F04C2/104; F04C14/00; F04C14/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US211582A
Cited
US1026662A
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US1389189A
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US1613525A
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US2162771A
Cited
US2101899A
Cited
US2138490A
Cited
US2240874A
Cited
US2275321A
Cited
US2417701A
Cited
US2509321A
Cited
US2478924A
Cited
US2565250A
Cited
US2498733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |