US2909009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machines
Assignee: Heald Machine Co
•
Filing: 1954-07-22
•
Granted: 1959-10-20
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 William D Schmidt
- 👤 Almon F Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/06; B24B5/00; B24B5/02; B24B5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743116A
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US1994754A
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US2078416A
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US2344371A
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US2402293A
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US2477508A
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US2603043A
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US2665579A
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US2647347A
Cited
US2694883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |