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US2809087A
Expired / Lapsed
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Preparation of porous photoconductive layers
Assignee: RCA Corp
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Filing: 1955-11-09
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Granted: 1957-10-08
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Expires: 1975-11-09
Abstract
No abstract record available.
Inventors
- 👤 Franz S Veith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:21
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF FORMING A POROUS PHOTOCONDUCTIVE LAYER ON A PREDETERMINED TARGET AREA WITHIN AN ELECTRON TUBE ENVELOPE HAVING A TARGET SUPPORT AND AN ELECTRON GUN INCLUDING A TUBULAR ACCELERATING ELECTRODE HAVING A MESH SCREEN ELECTRODE MOUNTED AT THE END THEREOF ADJACENT TO THE TARGET SUPPORT, SAID METHOD COMPRISING THE STEPS OF EVAPORATING PHOTOCONDUCTIVW MATERIAL IN THE PRESENCE OF INERT GAS UNDER LOW PRESSURE THROUGH SAID MESH SCREEN ELECTRODE TO FORM A POROUS PHOTOCONDUCTIVE LAYER ON SAID TARGET SUPPORT, MAINTAINING SAID TARGET SUPPORT AND THE PHOTOCONDUCTIVE LAYER CARRIED THEREBY AT A
Claim 2
Independent Claim
91 words
THE METHOD OF FORMING A POROUS PHOTOCONDUCTIVE LAYER ON A PREDETERMINED TARGET AREA WITHIN AN ELECTRON TUBE ENVELOPE HAVING A TARGET SUPPORT AND AN ELECTRON GUN INCLUDING A TUBULAR ACCELERATING ELECTRODE HAVING A MESH SCREEN ELECTRODE MOUNTED AT THE END THEREOF ADJACENT TO THE TARGET SUPPORT, SAID METHOD COMPRISING THE STEPS OF EVAPORATING PHOTOCONDUCTIVW MATERIAL IN THE PRESENCE OF INERT GAS UNDER LOW PRESSURE THROUGH SAID MESH SCREEN ELECTRODE TO FORM A POROUS PHOTOCONDUCTIVE LAYER ON SAID TARGET SUPPORT, MAINTAINING SAID TARGET SUPPORT AND THE PHOTOCONDUCTIVE LAYER CARRIED THEREBY AT A
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |