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US2995698A
Expired / Lapsed
US
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Magnetic resonance spectrometer and bridge circuit
Assignee: Phillips Petroleum Co
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Filing: 1957-04-17
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Granted: 1961-08-08
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Russell L Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:51
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191315A
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US2243921A
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US2462599A
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GB585790A
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US2440283A
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US2476496A
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US2443094A
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US2760158A
Cited
GB745873A
Cited
US2772391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |