Patent US3410997A successfully refreshed from Google Patents.
US3410997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipole mass filter
Assignee: Bell and Howell Co
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Filing: 1964-09-08
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Granted: 1968-11-12
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Wilson M Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/42; H01J49/4205; H01J49/421; H01J49/4215; H01J49/4255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A MULTIPOLE MASS FILTER FOR SELECTIVELY DETECTING CHARGED PARTICLES COMPRISING: A SOURCE OF CHARGED PARTICLES, A PLURALITY OF SUBSTANTIALLY PARALLEL FIRST ELECTRODES SYMMETRICALLY DISPOSED ABOUT A CENTRAL AXIS, SAID ELECTRODES BEING LATERALLY SPACED ABOUT THE CENTRAL AXIS ELECTRODES, A SOURCE OF AC VOLTAGE, MEANS COUPLING THE FIRST ELCTRODES TO THE AC VOLTAGE TO CREATE AN ALTERNATING MULTIPOLE ELECTRIC FIELD COMPONENT BETWEEN THE ELECTRODES, A SOURCE OF DC VOLTAGE, MEANS COUPLING THE FIRST ELECTRODES TO THE DC VOLTAGE TO CREATE A STATIC MULTIPOLE ELECTRIC FIELD COMPONENT BETWEEN THE ELECTRODES, A PLURALITY OF SECOND ELECTRODES DISPOSED IN SPACED RELATION TO THE EXIT END OF THE FIRST ELECTRODES, THE SECOND ELECTRODES HAVING A PORTION THEREOF ADJACENT THE EXIT END OF THE FIRST ELECTRODES DISPOSED IN ALIGNMENT WITH RELATION TO THE FIRST ELECTRODES AND THE CENTRAL AXIS OF THE FIRST ELECTRODES AND A PORTION THEREOF REMOTE FROM THE EXIT END OF THE FIRST ELECTRODES DISPOSED OUT OF ALIGNMENT WITH RELATION TO THE CENTRAL AXIS OF THE FIRST ELECTRODES, A COLLECTOR DISPOSED ADJACENT THE EXIT END OF THE SECOND ELECTRODES, AND MEANS FOR CONNECTING THE PLURALITY OF SECOND ELECTRODES TO A SOURCE OF DEFLECTING VOLTAGE FOR DIVERTING THE TRAJECTORY OF A CHARGED PARTICLE BEAM EMERGING FROM THE EXIT END OF THE FIRST ELECTRODES.
Claim 2
Dependent Claim
208 words
A MULTIPOLE MASS FILTER FOR SELECTIVELY DETECTING CHARGED PARTICLES COMPRISING: A SOURCE OF CHARGED PARTICLES, A PLURALITY OF SUBSTANTIALLY PARALLEL FIRST ELECTRODES SYMMETRICALLY DISPOSED ABOUT A CENTRAL AXIS, SAID ELECTRODES BEING LATERALLY SPACED ABOUT THE CENTRAL AXIS ELECTRODES, A SOURCE OF AC VOLTAGE, MEANS COUPLING THE FIRST ELCTRODES TO THE AC VOLTAGE TO CREATE AN ALTERNATING MULTIPOLE ELECTRIC FIELD COMPONENT BETWEEN THE ELECTRODES, A SOURCE OF DC VOLTAGE, MEANS COUPLING THE FIRST ELECTRODES TO THE DC VOLTAGE TO CREATE A STATIC MULTIPOLE ELECTRIC FIELD COMPONENT BETWEEN THE ELECTRODES, A PLURALITY OF SECOND ELECTRODES DISPOSED IN SPACED RELATION TO THE EXIT END OF THE FIRST ELECTRODES, THE SECOND ELECTRODES HAVING A PORTION THEREOF ADJACENT THE EXIT END OF THE FIRST ELECTRODES DISPOSED IN ALIGNMENT WITH RELATION TO THE FIRST ELECTRODES AND THE CENTRAL AXIS OF THE FIRST ELECTRODES AND A PORTION THEREOF REMOTE FROM THE EXIT END OF THE FIRST ELECTRODES DISPOSED OUT OF ALIGNMENT WITH RELATION TO THE CENTRAL AXIS OF THE FIRST ELECTRODES, A COLLECTOR DISPOSED ADJACENT THE EXIT END OF THE SECOND ELECTRODES, AND MEANS FOR CONNECTING THE PLURALITY OF SECOND ELECTRODES TO A SOURCE OF DEFLECTING VOLTAGE FOR DIVERTING THE TRAJECTORY OF A CHARGED PARTICLE BEAM EMERGING FROM THE EXIT END OF THE FIRST ELECTRODES.
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) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |