Patent US3069756A successfully refreshed from Google Patents.
US3069756A
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US
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Method of forming gear blanks
Assignee: Doosan Bobcat North America Inc
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Filing: 1958-07-10
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Granted: 1962-12-25
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Expires: 1978-07-10
Abstract
No abstract record available.
Inventors
- 👤 Neil E Colestock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:31
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/28; B21K1/30; B21J; B21J5/00; B21J5/02; B21J5/027; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467; Y10T29/49478; Y10T29/49789; Y10T29/4979; Y10T29/49792
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1606282A
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GB330840A
Cited
US2116804A
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US2203125A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |