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Patent US3446957A successfully refreshed from Google Patents.
US3446957A
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Ion cyclotron resonance spectrometer employing means for recording ionization potentials
Assignee: Varian Medical Systems Inc
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Filing: 1967-05-02
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Granted: 1969-05-27
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Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 David E Gielow
- 👤 Peter M Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:57
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/36; H01J49/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3355587A
Cited
US3244876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |