US3891884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device having electron multipactor suppression coating on window body
Assignee: Raytheon Co
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Filing: 1973-12-17
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Granted: 1975-06-24
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Expires: 1993-12-17
Abstract
Abstract A dielectric body which is permeable to electromagnetic wave energy of a material selected from the group consisting of alumina and beryllia ceramics is provided with a coating of a semiconducting oxide to substantially suppress electron multipactoring. The exemplary materials include semiconducting oxides of silicon and transition metals including copper, cobalt, chromium, iron, manganese and nickel. Thicknesses averaging 1,000 Angstrom units have resulted in substantial increases in the power handling ability of electromagnetic devices employing such dielectric bodies.
Inventors
- 👤 Lawrence H Tisdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:06
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01P; H01P1/00; H01P1/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
60 words
An electron discharge device comprising: an evacuated envelope having an access opening for propagating electromagnetic energy; a body Of a dielectric material sealing said access opening; a coating of a semiconducting oxide material of a transition metal having a thickness averaging about 1,000 Angstrom units on the surface of said dielectric body exposed to the vacuum to suppress electron multipactoring.
Claim 2
Dependent Claim
60 words
An electron discharge device comprising: an evacuated envelope having an access opening for propagating electromagnetic energy; a body Of a dielectric material sealing said access opening; a coating of a semiconducting oxide material of a transition metal having a thickness averaging about 1,000 Angstrom units on the surface of said dielectric body exposed to the vacuum to suppress electron multipactoring.
Claim 3
Dependent Claim
37 words
The device according to claim 1 wherein said dielectric material is selected from the group including alumina and beryllia and said coating material is selected from the group including silicon, chromium, cobalt, copper, iron, manganese and nickel.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |