Patent US3697794A successfully refreshed from Google Patents.
US3697794A
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US
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Photocathode comprising layers of tin oxide, antimony oxide, and antimony
Assignee: RCA Corp
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Filing: 1969-03-19
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Granted: 1972-10-10
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Expires: 1989-03-19
Abstract
Abstract In a photocathode comprising a substrate of tin oxide having thereon a photoemissive coating including antimony, a layer of antimony oxide is interposed between the tin oxide substrate and the photoemissive coating.
Inventors
- 👤 Richard G Stoudenheimer
- 👤 Rodger P Dourte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:12
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/34; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3426; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949; Y10T428/298
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
The tube defined in claim 1 and wherein said tin oxide layer has a thickness of about 0.1 to 1.0 micron and said layer of antimony oxide has a thickness measured by light transmission of the unoxidized antimony that is about 50% of that through said insulating substrate and said tin oxide layer prior to application of said layer of antimony oxide.
Claim 2
Dependent Claim
13 words
a layer consisting of non-porous antimony oxide on said tin oxide layer, and
Claim 3
Dependent Claim
10 words
a photoemissive layer including antimony on said antimony oxide layer.
Claim 4
Dependent Claim
61 words
A photocathode of reduced lateral resistance comprising: a. a substrate comprising tin oxide, b. a photoemissive layer over said substrate and comprising sensitized antimony, and c. a layer consisting of non-porous antimony oxide about 100 to 300 Angstroms thick intermediate said tin oxide substrate and said photoemissive layer, for isolating said photoemissive layer from poisoning effects of said tin oxide substrate.
Claim 5
Dependent Claim
64 words
An electrode for an electron tube comprising a structure including: a. a tin oxide substrate, b. a layer of antimony oxide about 100 to 300 Angstroms thick on said substrate, and c. a layer of photoemissive material on said antimony oxide layer, said structure having a resistivity that is from 5 to 10 percent less than the resistivity of the tin oxide substrate alone.
Claim 6
Dependent Claim
16 words
The electrode defined in claim 4 having a photoemissive layer containing antimony on said antimony oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |