Patent US2994992A successfully refreshed from Google Patents.
US2994992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radius grinding machine and spindle
Assignee: —
•
Filing: —
•
Granted: 1961-08-08
•
Expires: 1978-08-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:46
CPC Classifications
B; B24; B24B; B24B11/00; B24B47/00; B24B47/02; B24B47/06; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17411; Y10T279/17461; Y10T279/17529; Y10T279/34; Y10T279/3481
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1255962A
Cited
US2058731A
Cited
AT186947B
Cited
US2403136A
Cited
US2648175A
Cited
US2775073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |