Patent US2573653A successfully refreshed from Google Patents.
US2573653A
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Apparatus for thermochemically cutting gears
Assignee: IDAHO SPROCKET AND MACHINE WOR
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Filing: 1948-01-19
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Granted: 1951-10-30
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Expires: 1968-01-19
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Schrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:37
CPC Classifications
B; B23; B23K; B23K7/00; B23F; B23F17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1825606A
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US2089014A
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GB438940A
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US2142436A
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US2189140A
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US2190360A
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US2345104A
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US2383607A
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US2377844A
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US2378017A
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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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |