US3029522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining surface irregularities
Assignee: Standard Vacuum Oil Co
•
Filing: 1958-12-18
•
Granted: 1962-04-17
•
Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Stolle Donald Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:45
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/28; G01B7/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2330801A
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DE870765C
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US2398562A
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US2608092A
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US2576590A
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US2672049A
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US2620655A
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GB696643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |