Patent US2538844A successfully refreshed from Google Patents.
US2538844A
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US
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Broaching tool
Assignee: COLONIAL BROACH CO
•
Filing: 1948-10-19
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Granted: 1951-01-23
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Expires: 1968-10-19
Abstract
No abstract record available.
Inventors
- 👤 William A Nimz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:09
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/16; B23; B23D; B23D43/00; B23D43/02; Y; Y10; Y10S; Y10S451/00; Y10S451/914; Y10T; Y10T407/00; Y10T407/16; Y10T407/1628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2439822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |