US2834111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical surface gauge
Assignee: Individual
•
Filing: 1953-05-11
•
Granted: 1958-05-13
•
Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 John B Sweany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:02
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30; G01B11/306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1662836A
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US2198836A
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US2511975A
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US2342828A
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US2400840A
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US2467733A
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US2570275A
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US2759393A
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US2763932A
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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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |