US3202609A
Expired / Lapsed
US
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High mobility photoconductor sintered shapes and process for their preparation
Assignee: International Business Machines Corp
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Filing: 1962-01-31
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Granted: 1965-08-24
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Reisman Arnold
- 👤 Berkenblit Melvin
- 👤 Cheroff George
- 👤 Hochberg Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/547
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
CADMIUM SELENIDE PHOTOCONDUCTOR SINTERED DISC SHAPES HAVING A HIGH EFFECTIVE MOBILITY OF ABOUT 70050,000 CM.2/VOLT SEC. PREPARED BY PROCESS WHICH COMPRISES: (1) MIXING CADMIUM SELENIDE POLYCRYSTALLINE POWDER WITH SUFFICIENT COPPER AS IN SOLUTION TO YIELD A MATERIAL CONTAINING 100 TO 400 PARTS PER MILLION OF THE COPPER BY WEIGHT; (2) PRESSING THE DOPED CADMIUM SELENIDE POWDER INTO DISC SHAPES AT A PRESURE FROM 25,000 TO 100,000 POUNDS PER SQUARE INCH; (3) EQUILIBRIUM SINTERING THE PRESSED DISCS AT A TEMPERATURE BETWEEN 700-1100*C. FOR FROM 1 HOUR TO 8 HOURS IN A VACUUM AT A PRESSURE FROM 1-7X10**-6 MM. OF MERCURY; (4) THEN STEADY STATE SINTERING THESE DISCS AT A TEMPERATUR OF 500*-600*C. FOR 1 TO 5 HOURS IN A VACUUM AT A PRESSURE FROM 1-7X10**-6 MM. OF MERCURY;
Claim 2
Dependent Claim
127 words
CADMIUM SELENIDE PHOTOCONDUCTOR SINTERED DISC SHAPES HAVING A HIGH EFFECTIVE MOBILITY OF ABOUT 70050,000 CM.2/VOLT SEC. PREPARED BY PROCESS WHICH COMPRISES: (1) MIXING CADMIUM SELENIDE POLYCRYSTALLINE POWDER WITH SUFFICIENT COPPER AS IN SOLUTION TO YIELD A MATERIAL CONTAINING 100 TO 400 PARTS PER MILLION OF THE COPPER BY WEIGHT; (2) PRESSING THE DOPED CADMIUM SELENIDE POWDER INTO DISC SHAPES AT A PRESURE FROM 25,000 TO 100,000 POUNDS PER SQUARE INCH; (3) EQUILIBRIUM SINTERING THE PRESSED DISCS AT A TEMPERATURE BETWEEN 700-1100*C. FOR FROM 1 HOUR TO 8 HOURS IN A VACUUM AT A PRESSURE FROM 1-7X10**-6 MM. OF MERCURY; (4) THEN STEADY STATE SINTERING THESE DISCS AT A TEMPERATUR OF 500*-600*C. FOR 1 TO 5 HOURS IN A VACUUM AT A PRESSURE FROM 1-7X10**-6 MM. OF MERCURY;
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |