US1710647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for grinding twist drills
Assignee: Old Carco LLC
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Filing: 1924-10-10
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Granted: 1929-04-23
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Expires: 1944-10-10
Abstract
No abstract record available.
Inventors
- 👤 Sidney C Probert
- 👤 Robert E Spurr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:05
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/32
Claims Analysis
Total Claims: 0
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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) | 1932-04-22 | 1932-10-22 | 1933-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-04-22 | 1936-10-22 | 1937-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-04-22 | 1940-10-22 | 1941-04-23 | $7700.00 | Window Closed / Lapsed |