US2538622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining surface quality
Assignee: Elsag Bailey Inc
•
Filing: 1944-12-08
•
Granted: 1951-01-16
•
Expires: 1964-12-08
Abstract
No abstract record available.
Inventors
- 👤 Johnson Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
G; G01; G01B; G01B13/00; G01B13/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985576A
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US1938492A
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US1931925A
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US2171433A
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US2244864A
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US2305264A
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US2330801A
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US2354423A
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US2375600A
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US2374154A
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US2369319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |