US2460726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface roughness measuring device
Assignee: Brush Development Co
•
Filing: 1943-01-11
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Granted: 1949-02-01
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Expires: 1963-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:32
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2083759A
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US1976337A
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US2016420A
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US2146442A
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US2240278A
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US2171433A
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US2329084A
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US2335390A
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US2396394A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-01 | 1952-08-02 | 1953-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-01 | 1956-08-02 | 1957-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-01 | 1960-08-02 | 1961-02-01 | $7700.00 | Window Closed / Lapsed |