Patent US1815336A successfully refreshed from Google Patents.
US1815336A
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Method and apparatus for grinding gears
Assignee: Gleason Works
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Filing: 1929-02-28
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Granted: 1931-07-21
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Expires: 1949-02-28
Abstract
No abstract record available.
Inventors
- 👤 Bernard E Shlesinger
- 👤 Thomas M Durkan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:21
CPC Classifications
B; B23; B23F; B23F9/00; B23F9/02; B23F9/025; B23F23/00; B23F23/12; B23F23/1237; B23F23/1262; Y; Y10; Y10S; Y10S451/00; Y10S451/90
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) | 1934-07-20 | 1935-01-19 | 1935-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-20 | 1939-01-19 | 1939-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-20 | 1943-01-19 | 1943-07-21 | $7700.00 | Window Closed / Lapsed |