Patent US2894388A successfully refreshed from Google Patents.
US2894388A
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Electromagnetic testing apparatus for measuring the tack of fluids
Assignee: Pure Oil Co
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Filing: 1956-05-03
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Granted: 1959-07-14
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Expires: 1976-05-03
Abstract
No abstract record available.
Inventors
- 👤 George R Cook
- 👤 Lynn E Ellison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341431A
Cited
US1527409A
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US2070862A
Cited
US2345968A
Cited
US2675222A
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US2677275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |