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Patent US1833227A successfully refreshed from Google Patents.
US1833227A
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Method of forming teeth in gear blanks
Assignee: Illinois Tool Works Inc
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Filing: 1930-01-11
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Granted: 1931-11-24
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Expires: 1950-01-11
Abstract
No abstract record available.
Inventors
- 👤 Carl G Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:51
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/12; B23F21/16; B23F5/00; B23F5/20; B23F5/22; Y; Y10; Y10T; Y10T407/00; Y10T407/17; Y10T407/1715; Y10T407/173; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T409/101749
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) | 1934-11-23 | 1935-05-25 | 1935-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-23 | 1939-05-25 | 1939-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-23 | 1943-05-25 | 1943-11-24 | $7700.00 | Window Closed / Lapsed |