Patent US2572908A successfully refreshed from Google Patents.
US2572908A
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Thickness gauge for magnetic material
Assignee: Standard Oil Co
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Filing: 1948-09-18
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Granted: 1951-10-30
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Expires: 1968-09-18
Abstract
No abstract record available.
Inventors
- 👤 Irving R Brenholdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:30
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB299388A
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US2057835A
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US2033654A
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US2078796A
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US2189092A
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US2146857A
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US2154156A
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US2228294A
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US2349992A
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US2353211A
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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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |