Patent US2510145A successfully refreshed from Google Patents.
US2510145A
Expired / Lapsed
US
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Optical instrument for visually comparing a surface with a selected one of a plurality of standard surfaces
Assignee: Individual
•
Filing: 1946-11-13
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Granted: 1950-06-06
•
Expires: 1966-11-13
Abstract
No abstract record available.
Inventors
- 👤 Short Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1957043A
Cited
US2027663A
Cited
US2034096A
Cited
US2040066A
Cited
US2184750A
Cited
US2286430A
Cited
US2423370A
Cited
US2389544A
Cited
US2470176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |