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US2402926A
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Method of quantitatively evaluating roughness of metals
Assignee: Individual
•
Filing: 1944-11-25
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Granted: 1946-06-25
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Expires: 1964-11-25
Abstract
No abstract record available.
Inventors
- 👤 Harry K Herschman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-06-24 | 1949-12-24 | 1950-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-24 | 1953-12-24 | 1954-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-24 | 1957-12-24 | 1958-06-25 | $7700.00 | Window Closed / Lapsed |