Patent US5679980A successfully refreshed from Google Patents.
Patent US2865257A successfully refreshed from Google Patents.
US2865257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear chamfering machine of the universal type
Assignee: Individual
•
Filing: 1953-05-29
•
Granted: 1958-12-23
•
Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 John M Christman
- 👤 William H Bibbens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |