US3296434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating an ion source for a time of flight mass spectrometer
Assignee: Individual
•
Filing: 1964-05-26
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Granted: 1967-01-03
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Expires: 1984-05-26
Abstract
No abstract record available.
Inventors
- 👤 Martin H Studier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:37
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/40; H01J49/403; H01J49/02; H01J49/10; H01J49/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A METHOD OF OPERATING A TIME OF FLIGHT MASS SPECTROMETER ION SOURCE HAVING A BACKING PLATE AND FIRST AND SECOND GRIDS COMPRISING THE STEPS CONTINUOUSLY GENERATING POSITIVE IONS BETWEEN SAID BACKING PLATE AND SAID FIRST GRID, PERIODICALLY GENERATING A NEGATIVE POTENTIAL PULSE HAVING A SHORT RISE TIME AND LONG DECAY TIME, APPLYING EACH OF SAID NEGATIVE PULSES TO SAID FIRST GRID TO ATTRACT GENERATED IONS THERETO, INTEGRATING EACH OF SAID NEGATIVE POTENTIAL PULSES WHILE APPLYING SAID PULSES TO SAID FIRST GRID, APPLYING EACH OF SAID INTEGRATED PULSES TO SAID BACKING PLATE TO CREATE A COMPENSATING ION ATTRACTION EFFECT FOR THE DECAY TIME DURATION OF EACH OF SAID APPLIED NEGATIVE POTENTIAL PULSE, AND APPLYING A CONTINUOUS NEGATIVE POTENTIAL TO SAID SECOND GRID TO ACCELERATE IONS PERIODICALLY ATTRACTED TO SAID FIRST GRID.
References Cited (Backward Citations)
US2758214A
Cited
US2784317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |