Patent US3405263A successfully refreshed from Google Patents.
US3405263A
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US
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Dual mass spectrometer ion source comprising field ionization and electron bombardment sources and the method of use
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-01-14
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Granted: 1968-10-08
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Expires: 1986-01-14
Abstract
No abstract record available.
Inventors
- 👤 Graham G Wanless
- 👤 Jr Boyd E Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:05
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/14; H01J49/147; H01J49/16; H01J49/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |