Patent US2833675A successfully refreshed from Google Patents.
US2833675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of imparting red response to a photoconductive target for a pickup tube
Assignee: RCA Corp
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Filing: 1953-10-01
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Granted: 1958-05-06
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Expires: 1973-10-01
Abstract
No abstract record available.
Inventors
- 👤 Paul K Weimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:08
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF FORMING A PHOTOCONDUCTIVE LAYER ON A SUPPORTING BASE MEMBER, SAID METHOD COMPRISING DEPOSITING A LAYER OF AMORPHOUS SELENIUM ON SAID BASE MEMBER, SAID BASE MEMBER BEING MAINTAINED AT A TEMPERATURE BELOW THAT AT WHICH CRYSTALLINE SELENIUM IS FORMED, HEATING SAID LAYER UNIFORMLY AT A TEMPERATURE OF THE ORDER OF 80-100*C., AND CONTINUING THE HEATING FOR A TIME WITHIN THE APPROXIMATE RANGE OF 15-1.5 MINUTES WHEREBY THE RED RESPONSE OF SAID LAYER APPROACHES A MAXIMUM.
Claim 2
Independent Claim
77 words
THE METHOD OF FORMING A PHOTOCONDUCTIVE LAYER ON A SUPPORTING BASE MEMBER, SAID METHOD COMPRISING DEPOSITING A LAYER OF AMORPHOUS SELENIUM ON SAID BASE MEMBER, SAID BASE MEMBER BEING MAINTAINED AT A TEMPERATURE BELOW THAT AT WHICH CRYSTALLINE SELENIUM IS FORMED, HEATING SAID LAYER UNIFORMLY AT A TEMPERATURE OF THE ORDER OF 80-100*C., AND CONTINUING THE HEATING FOR A TIME WITHIN THE APPROXIMATE RANGE OF 15-1.5 MINUTES WHEREBY THE RED RESPONSE OF SAID LAYER APPROACHES A MAXIMUM.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |