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US2695987A
Expired / Lapsed
US
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Testing circuit
Assignee: Phillips Petroleum Co
•
Filing: 1951-11-19
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Granted: 1954-11-30
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Mccollom
- 👤 Boisblanc Deslonde R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:00
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660405A
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US2324458A
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US2458974A
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US2459849A
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US2594138A
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US2583130A
Cited
US2498103A
Cited
US2578455A
Cited
US2649567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |