Patent US4936626A successfully refreshed from Google Patents.
Patent US2540367A successfully refreshed from Google Patents.
US2540367A
Expired / Lapsed
US
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Method of grinding and finishing strip metal
Assignee: Individual
•
Filing: 1947-07-05
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Granted: 1951-02-06
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Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:26
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/12; B24B7/13; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1921039A
Cited
US743911A
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US1145114A
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US2023904A
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US2056424A
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US2171300A
Cited
US2250398A
Cited
US2282723A
Cited
US2302120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |