Patent US2668480A successfully refreshed from Google Patents.
US2668480A
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US
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Method and means for burring or chamfering gears
Assignee: Individual
•
Filing: 1950-01-07
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Granted: 1954-02-09
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Expires: 1970-01-07
Abstract
No abstract record available.
Inventors
- 👤 John M Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:17
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/10; B23F19/101; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101113; Y10T409/101272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1110274A
Cited
US1578589A
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US1929770A
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US1975151A
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US2078124A
Cited
US2443089A
Cited
US2433201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |