Patent US1979973A successfully refreshed from Google Patents.
US1979973A
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Broaching machine
Assignee: COLONIAL BROACH CO
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Filing: 1931-02-12
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Granted: 1934-11-06
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Expires: 1951-02-12
Abstract
No abstract record available.
Inventors
- 👤 Carl J Halborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/10; B23D; B23D37/00; B23D37/02; B23D37/06; B23Q7/00; B23Q7/10; B23Q7/103; Y; Y10; Y10S; Y10S29/00; Y10S29/066; Y10S29/077; Y10T; Y10T409/00; Y10T409/40; Y10T409/40035; Y10T409/400525; Y10T409/40105; Y10T409/401225; Y10T409/40175; Y10T409/40455
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) | 1937-11-05 | 1938-05-07 | 1938-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-05 | 1942-05-07 | 1942-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-05 | 1946-05-07 | 1946-11-06 | $7700.00 | Window Closed / Lapsed |