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US2470290A
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US
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Saw grinder
Assignee: Individual
•
Filing: 1947-05-06
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Granted: 1949-05-17
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Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 John R Chryst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:04
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US574855A
Cited
US1491706A
Cited
US1264528A
Cited
US1501564A
Cited
US1874315A
Cited
US1970864A
Cited
US2333298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |