US2880119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for producing a photoconductive device
Assignee: Dresser Industries Inc
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Filing: 1956-10-01
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Granted: 1959-03-31
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Acey L Floyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:46
CPC Classifications
H; H10; H10P; H10P95/00; H10F; H10F71/00; H10F71/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCEDURE FOR PRODUCING A HIGH-SENSITIVITY PHOTOCONDUCTIVE DEPOSIT, COMPRISING: PREPARING A CELL BASE, DEPOSITING ON THE BASE IN VACUO A THIN FILM-LIKE DEPOSIT OF A PHOTOCONDUCTIVE MATERIAL COMPRISING PRINCIPALLY CADMIUM SULPHIDE, HEAT-TREATING SAID DEPOSIT OF MATERIAL TO AN EXTENT EXCEEDING THAT AT WHICH THE DEPOSIT ATTAINS MAXIMUM PHOTOCONDUCTIVE SENSITIVITY AND THEREAFTER SUBJECTING THE THUS-TREATED DEPOSIT TO A DILUTE ACID WASH TO RESTORE PHOTOCONDUCTIVE SENSITIVITY TO SAID DEPOSIT.
Claim 2
Dependent Claim
67 words
A PROCEDURE FOR PRODUCING A HIGH-SENSITIVITY PHOTOCONDUCTIVE DEPOSIT, COMPRISING: PREPARING A CELL BASE, DEPOSITING ON THE BASE IN VACUO A THIN FILM-LIKE DEPOSIT OF A PHOTOCONDUCTIVE MATERIAL COMPRISING PRINCIPALLY CADMIUM SULPHIDE, HEAT-TREATING SAID DEPOSIT OF MATERIAL TO AN EXTENT EXCEEDING THAT AT WHICH THE DEPOSIT ATTAINS MAXIMUM PHOTOCONDUCTIVE SENSITIVITY AND THEREAFTER SUBJECTING THE THUS-TREATED DEPOSIT TO A DILUTE ACID WASH TO RESTORE PHOTOCONDUCTIVE SENSITIVITY TO SAID DEPOSIT.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |