US2694883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentric grinding machine
Assignee: Landis Tool Co
•
Filing: 1952-04-04
•
Granted: 1954-11-23
•
Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Harold E Balsiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:20
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18; B24B5/28; B24B19/00; B24B19/02; B24B19/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1842375A
Cited
US2004649A
Cited
US1994754A
Cited
GB414533A
Cited
US2380761A
Cited
US2430423A
Cited
US2478607A
Cited
US2478562A
Cited
US2635395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |