Patent US2191469A successfully refreshed from Google Patents.
Patent US1928770A successfully refreshed from Google Patents.
US1928770A
Expired / Lapsed
US
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Machine for chamfering gears
Assignee: BILGRAM MACHINE WORKS Inc
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Filing: 1931-08-03
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Granted: 1933-10-03
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Expires: 1951-08-03
Abstract
No abstract record available.
Inventors
- 👤 Uhlmann Richard Max
- 👤 Maywhort John Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:34
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/10; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101113; Y10T409/101272; Y10T409/10954
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) | 1936-10-02 | 1937-04-03 | 1937-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-02 | 1941-04-03 | 1941-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-02 | 1945-04-03 | 1945-10-03 | $7700.00 | Window Closed / Lapsed |