Patent US3330707A successfully refreshed from Google Patents.
US3330707A
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Method for reducing electron multipactor on a dielectric window surface
Assignee: Varian Medical Systems Inc
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Filing: 1963-10-07
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Granted: 1967-07-11
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Expires: 1983-10-07
Abstract
No abstract record available.
Inventors
- 👤 Reed Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:10
CPC Classifications
H; H01; H01J; H01J19/00; H01P; H01P1/00; H01P1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD FOR REDUCING ELECTRON MULTIPACTOR ON THE SURFACE OF A DIELECTRIC WINDOW ADAPTABLE FOR PASSING ELECTROMAGNETIC WAVES OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND BERYLLIA COMPRISING THE STEPS OF FORMING A COATING ON THE SURFACE OF SAID DIELECTRIC WINDOW CONSISTING OF TITANIUM SUBOXIDE WHICH HAS A SECONDARY ELECTRON EMISSION COEFFICIENT WHOSE MAXIMUM VALUE IS LESS THAN UNITY, HEATING SAID COATED DIELECTRIC WINDOW TO A TEMPERATURE OF 1425*C. FOR A PERIOD OF THIRTY MINUTES IN A REDUCING ATMOSPHERE, AND ETCHING AWAY A PORTION OF SAID TITANIUM SUBOXIDE MATERIAL REMAINING ON THE SURFACE OF SAID DIELECTRIC WINDOW WITH A 5% HF ACID SOLUTION FOR A PERIOD OF THIRTY MINUTES AT ROOM TEMPERATURE TO INCREASE THE RESISTANCE OF THE SURFACE OF SAID DIELECTRIC WINDOW TO A VALUE GREATER THAN 10**8 OHMS PER SQUARE.
Claim 2
Independent Claim
135 words
A METHOD FOR REDUCING ELECTRON MULTIPACTOR ON THE SURFACE OF A DIELECTRIC WINDOW ADAPTABLE FOR PASSING ELECTROMAGNETIC WAVES OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND BERYLLIA COMPRISING THE STEPS OF FORMING A COATING ON THE SURFACE OF SAID DIELECTRIC WINDOW CONSISTING OF TITANIUM SUBOXIDE WHICH HAS A SECONDARY ELECTRON EMISSION COEFFICIENT WHOSE MAXIMUM VALUE IS LESS THAN UNITY, HEATING SAID COATED DIELECTRIC WINDOW TO A TEMPERATURE OF 1425*C. FOR A PERIOD OF THIRTY MINUTES IN A REDUCING ATMOSPHERE, AND ETCHING AWAY A PORTION OF SAID TITANIUM SUBOXIDE MATERIAL REMAINING ON THE SURFACE OF SAID DIELECTRIC WINDOW WITH A 5% HF ACID SOLUTION FOR A PERIOD OF THIRTY MINUTES AT ROOM TEMPERATURE TO INCREASE THE RESISTANCE OF THE SURFACE OF SAID DIELECTRIC WINDOW TO A VALUE GREATER THAN 10**8 OHMS PER SQUARE.
References Cited (Backward Citations)
CA639638A
Cited
US3094436A
Cited
US2985548A
Cited
US3036018A
Cited
US3252034A
Cited
US3165430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |