US3272984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron multiplier for measuring the flow of positively charged particles
Assignee: GCA Corp
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Filing: 1963-06-07
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Granted: 1966-09-13
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Richard F Herzog
- 👤 Gerhard O Sauermann
- 👤 William J Mcmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:39
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
APPARATUS FOR MEASURING THE FLOW OF POSITIVELY CHARGED PARTICLES, COMPRISING AND EVACUATED FERROMAGNETIC HOUSING, A FIRST COLLECTOR ELECTRODE MOUNTED IN SAID HOUSING AND INSULATED THEREFROM, AN ELECTRON MULTIPLIER COMPRISING A SECOND COLLECTOR ELECTRODE AND A SERIES OF DYNODES INTERCONNECTED BY RESISTORS AND ARRAYED TO FORM AN ELECTRON MULTIPLIER, SAID SERIES HAVING AN INPUT END COMPRISING A FIRST DYNODE AND AN OUTPUT END COMPRISING A LAST DYNODE CONFRONTING SAID SECOND ELECTRODE, A CONDUCTIVE HOUSING SURROUNDING SAID DYNODES AND ELECTRICALLY CONNECTED TO THE SAID FIRST DYNODE, MEANS FOR APPLYING A NEGATIVE POTENTIAL TO SAID FIRST DYNODE WITH RESPECT TO SAID FIRST DYNODE, AN ION LENS COMPRISING AN APERTURE IN SAID HOUSING FOR FOCUSING A STREAM OF ION ON SAID FIRST DYNODE, AN APERTURE IN SAID FERROMAGNETIC HOUSING COMPRISING MEANS DEFINING A SLIT FOR ADMITTING A BEAM OF IONS TO SAID HOUSING, A PAIR OF DEFLECTOR ELECTRODES ON EITHER SIDE OF THE
Claim 2
Dependent Claim
149 words
APPARATUS FOR MEASURING THE FLOW OF POSITIVELY CHARGED PARTICLES, COMPRISING AND EVACUATED FERROMAGNETIC HOUSING, A FIRST COLLECTOR ELECTRODE MOUNTED IN SAID HOUSING AND INSULATED THEREFROM, AN ELECTRON MULTIPLIER COMPRISING A SECOND COLLECTOR ELECTRODE AND A SERIES OF DYNODES INTERCONNECTED BY RESISTORS AND ARRAYED TO FORM AN ELECTRON MULTIPLIER, SAID SERIES HAVING AN INPUT END COMPRISING A FIRST DYNODE AND AN OUTPUT END COMPRISING A LAST DYNODE CONFRONTING SAID SECOND ELECTRODE, A CONDUCTIVE HOUSING SURROUNDING SAID DYNODES AND ELECTRICALLY CONNECTED TO THE SAID FIRST DYNODE, MEANS FOR APPLYING A NEGATIVE POTENTIAL TO SAID FIRST DYNODE WITH RESPECT TO SAID FIRST DYNODE, AN ION LENS COMPRISING AN APERTURE IN SAID HOUSING FOR FOCUSING A STREAM OF ION ON SAID FIRST DYNODE, AN APERTURE IN SAID FERROMAGNETIC HOUSING COMPRISING MEANS DEFINING A SLIT FOR ADMITTING A BEAM OF IONS TO SAID HOUSING, A PAIR OF DEFLECTOR ELECTRODES ON EITHER SIDE OF THE
References Cited (Backward Citations)
US2418574A
Cited
US2762928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |