Patent US2223920A successfully refreshed from Google Patents.
US2223920A
Expired / Lapsed
US
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Broaching machine
Assignee: COLONIAL BROACH CO
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Filing: 1937-12-31
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Granted: 1940-12-03
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Expires: 1957-12-31
Abstract
No abstract record available.
Inventors
- 👤 John D Rovick
- 👤 William A Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:11
CPC Classifications
B; B23; B23D; B23D37/00; B23D37/02; B23D37/04; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T409/00; Y10T409/40; Y10T409/403675; Y10T409/404025; Y10T409/40455; Y10T409/404725
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) | 1943-12-03 | 1944-06-03 | 1944-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-03 | 1948-06-03 | 1948-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-03 | 1952-06-03 | 1952-12-03 | $7700.00 | Window Closed / Lapsed |