Patent US2911531A successfully refreshed from Google Patents.
US2911531A
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US
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Ionization chamber for mass spectrometer
Assignee: Jersey Production Research Co
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Filing: 1956-03-12
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Granted: 1959-11-03
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 James A Rickard
- 👤 Frosch Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:31
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/14; H01J49/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2643341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |