Patent US2580989A successfully refreshed from Google Patents.
US2580989A
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Grinding lobed forms
Assignee: Bryant Grinder Corp
•
Filing: 1949-04-05
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Granted: 1952-01-01
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Expires: 1969-04-05
Abstract
No abstract record available.
Inventors
- 👤 Merton H Arms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:16
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/005; B24; B24B; B24B19/00; B24B19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874846A
Cited
US1997227A
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US2144771A
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US2189931A
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US2247228A
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US2368389A
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US2350234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |