Patent US2546490A successfully refreshed from Google Patents.
US2546490A
Expired / Lapsed
US
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Cylinder ridge grinder
Assignee: Individual
•
Filing: 1947-09-20
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Granted: 1951-03-27
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Expires: 1967-09-20
Abstract
No abstract record available.
Inventors
- 👤 Donald W Baldwin
- 👤 Wilfred G Thompson
- 👤 William A Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:47
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/002; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304424; Y10T409/306216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190013857A
Cited
US854819A
Cited
GB190622869A
Cited
US1217419A
Cited
US1429135A
Cited
US1499754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |