US3703155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for photocathode processing
Assignee: Individual
•
Filing: 1969-10-13
•
Granted: 1972-11-21
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Expires: 1989-10-13
Abstract
Abstract An evacuated coating chamber includes a substrate support and a centrally disposed heater means. A plurality of crucible means are located in separate chambers which are each radially disposed with respect to the coating chamber and having each a valve means operatively associated therewith. Means are adapted to sequentially translate the crucibles between said separate chambers and an operative position is proximity to said heater.
Inventors
- 👤 John P Choisser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:21
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A photocathode processing apparatus comprising: an evacuated chamber containing a cathode to be processed; an electric heater centrally disposed in said evacuated chamber; a plurality of channels extending substAntially radially from said evacuated chamber; a cup containing a pure alkali metal slidably disposed in each of said channels; and means for sequentially placing said cups in direct proximity to said heater whereby to evaporate said alkali metal and to coat said photocathode.
Claim 2
Dependent Claim
72 words
A photocathode processing apparatus comprising: an evacuated chamber containing a cathode to be processed; an electric heater centrally disposed in said evacuated chamber; a plurality of channels extending substAntially radially from said evacuated chamber; a cup containing a pure alkali metal slidably disposed in each of said channels; and means for sequentially placing said cups in direct proximity to said heater whereby to evaporate said alkali metal and to coat said photocathode.
Claim 3
Dependent Claim
72 words
A photocathode processing apparatus comprising: an evacuated chamber containing a cathode to be processed; an electric heater centrally disposed in said evacuated chamber; a plurality of channels extending substAntially radially from said evacuated chamber; a cup containing a pure alkali metal slidably disposed in each of said channels; and means for sequentially placing said cups in direct proximity to said heater whereby to evaporate said alkali metal and to coat said photocathode.
Claim 4
Dependent Claim
72 words
A photocathode processing apparatus comprising: an evacuated chamber containing a cathode to be processed; an electric heater centrally disposed in said evacuated chamber; a plurality of channels extending substAntially radially from said evacuated chamber; a cup containing a pure alkali metal slidably disposed in each of said channels; and means for sequentially placing said cups in direct proximity to said heater whereby to evaporate said alkali metal and to coat said photocathode.
Claim 5
Dependent Claim
24 words
The photocathode processing apparatus of claim 1 wherein: said means for sequentially placing said cups in proximity to said heater comprises a movable magnet.
Claim 6
Dependent Claim
23 words
The photocathode processing apparatus of claim 2 wherein: each of said cups is coupled to a magnetic slug for cooperation with said magnet.
References Cited (Backward Citations)
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |