Patent US1714136A successfully refreshed from Google Patents.
US1714136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for grinding the end faces of the lips of twist drills
Assignee: Old Carco LLC
•
Filing: 1927-10-05
•
Granted: 1929-05-21
•
Expires: 1947-10-05
Abstract
No abstract record available.
Inventors
- 👤 Sidney C Probert
- 👤 Robert E Spurr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:23
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/247; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17564; Y10T279/17923
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) | 1932-05-20 | 1932-11-19 | 1933-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-05-20 | 1936-11-19 | 1937-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-05-20 | 1940-11-19 | 1941-05-21 | $7700.00 | Window Closed / Lapsed |