US2129031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for grinding and polishing sprocket teeth
Assignee: United Research Corp
•
Filing: 1935-04-24
•
Granted: 1938-09-06
•
Expires: 1955-04-24
Abstract
No abstract record available.
Inventors
- 👤 Ross Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:17
CPC Classifications
B; B23; B23F; B23F3/00; B23F15/00; B23F15/005; B23F23/00; B23F23/12; B23F23/1237; Y; Y10; Y10S; Y10S451/00; Y10S451/90; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301232
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-09-05 | 1942-03-07 | 1942-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-05 | 1946-03-07 | 1946-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-05 | 1950-03-07 | 1950-09-06 | $7700.00 | Window Closed / Lapsed |