US3549993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion rate measuring method by maintaining electrolytic contact and excluding any substantial oxygen contact with a test specimen
Assignee: Union Oil Company of California
•
Filing: 1966-06-14
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Granted: 1970-12-22
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Expires: 1986-06-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Edward Schaschl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:32
CPC Classifications
G; G01; G01N; G01N17/00; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124771A
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US2830265A
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US2805198A
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US2824283A
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US2869003A
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US2956225A
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US2876321A
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US3004232A
Cited
US3222920A
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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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |