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Patent US2426807A successfully refreshed from Google Patents.
US2426807A
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Apparatus for shaping workpieces by grinding
Assignee: Thompson Grinder Co
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Filing: 1945-11-09
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Granted: 1947-09-02
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Expires: 1965-11-09
Abstract
No abstract record available.
Inventors
- 👤 John C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:26
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/02; B23F15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1536398A
Cited
US1696660A
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US1858568A
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US1850799A
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GB373736A
Cited
GB481722A
Cited
US2360127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |