US2866878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconducting devices
Assignee: RCA Corp
•
Filing: 1955-04-29
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Granted: 1958-12-30
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 George S Briggs
- 👤 Ralph W Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
H; H10; H10P; H10P95/00; H10F; H10F30/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A PHOTOCONDUCTIVE DEVICE COMPRISING A BODY CONSISTING ESSENTIALLY OF A PHYSICAL MIXTURE OF FINELY-DIVIDED CRYSTAL PARTICLES OF 25 TO 75 WEIGHT PERCENT PHOTOCONDUCTING CADMIUM SULPHIDE AND 25 TO 75 WEIGHT PERCENT PHOTOCONDUCTING CADMIUM SELENIDE DISPERSED IN AN ELECTRICALLYINSULATING, FILM-FORMING VEHICLE, AND AT LEAST ONE ELECTRODE IN CONTACT WITH SAID BODY.
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) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |