US2942389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear finishing
Assignee: Nachi Machining Technology Co
•
Filing: 1957-08-29
•
Granted: 1960-06-28
•
Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 Walter S Praeg
- 👤 Jr John J Sigman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:01
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/10; B23F19/00; B23F19/05; B23F19/055; B23F19/057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1989650A
Cited
US1989651A
Cited
GB391058A
Cited
US2165386A
Cited
US2105896A
Cited
US2351842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |