US2997408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing photoconductive cadmium sulfide
Assignee: TDK Micronas GmbH
•
Filing: 1958-05-21
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Granted: 1961-08-22
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Heureux Robert C L
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A PROCESS FOR PRODUCING A PHOTOCONDUCTIVE LAYER OF CADMIUM SULFIDE COMPRISING THE STEPS OF: PREPARING A SOLUTION OF DISSOLVED ACTIVATOR AND CO-ACTIVATOR INGREDIENTS IN THE DESIRED PROPORTION, APPLYING A QUANTITY OF SAID SOLUTION TO AN INERT SURFACE SERVING AS THE BACKING FOR SAID PHOTOCONDUCTIVE LAYER, EVAPORATING THE SOLVENT OF SAID SOLUTION TO PRECIPITABLE SAID ACTIVATOR AND CO-ACTIVATOR, WHICH FORM A SUBSTRATUM ON SAID BACKING, AND SUBLIMATING CADMIUM SULFIDE TO FORM A LAYER OVER SAID SUBSTRATUM WHICH BECOMES DISPELLED THROUGH THE CADMIUM SULFIDE DURING SUBLIMATION TO RENDER THE CADMIUM SULFIDE PHOTOCONDUCTIVE.
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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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |