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US879631A
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Method of making drills.
Assignee: Morse-Twist Drill & Machine Co
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Filing: 1907-12-18
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Granted: 1908-02-18
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Expires: 1927-12-18
Abstract
No abstract record available.
Inventors
- 👤 Lewis Gregson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:56
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/06; B21; B21K; B21K5/00; B21K5/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T408/00; Y10T408/89; Y10T408/907
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) | 1911-02-17 | 1911-08-19 | 1912-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-02-17 | 1915-08-19 | 1916-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-02-17 | 1919-08-19 | 1920-02-18 | $7700.00 | Window Closed / Lapsed |