US2759861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making photoconductive compounds
Assignee: AT&T Inc
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Filing: 1954-09-22
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Granted: 1956-08-21
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Expires: 1974-09-22
Abstract
No abstract record available.
Inventors
- 👤 Robert J Collins
- 👤 Frederick W Reynolds
- 👤 George R Stilwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/58; C23C14/5806; C23C14/06; C23C14/0617; C23C14/22; C23C14/54; C23C14/541; H; H01; H01B; H01B1/00; H10; H10F; H10F99/00; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/065; Y10S148/072; Y10S148/142; Y10S148/158; Y10S148/169; Y10S438/00; Y10S438/914; Y10S438/925; Y10S438/971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A POROCESS FOR MAKING PHOTOCONDUCTIVE LAYERS OF INDIUM ANTIMONIDE COMPRISING THE STEPS OF SIMULTANEOUSLY EVAPORATING INDIUM AT A TEMPERATURE OF ABOUT 1100* C. AND ANTIMONY AT A TEMPERATURE OF ABOUT 725* C. IN A VACUUM OF A LEAST 5X10-6 MILLIMETERS OF MERCURY ONTO A SURFACE AT A RATE IN THE ORDER OF 50 ANGSTROMS PER SECOND, SAID SURFACE BEING AT A TEMPERATURE IN THE RANGE FROM 75* C. TO 150* C., AND ANNEALING SAID COMPOUND SO FORMED IN A VACUUM OF AT LEAST 5X10-6 MILIMETERS OF MERCURY AT SUBSTANTIALLY 200* C. FOR A PERIOD OF SUBSTANTIALLY SIX HOURS.
Claim 2
Dependent Claim
98 words
A POROCESS FOR MAKING PHOTOCONDUCTIVE LAYERS OF INDIUM ANTIMONIDE COMPRISING THE STEPS OF SIMULTANEOUSLY EVAPORATING INDIUM AT A TEMPERATURE OF ABOUT 1100* C. AND ANTIMONY AT A TEMPERATURE OF ABOUT 725* C. IN A VACUUM OF A LEAST 5X10-6 MILLIMETERS OF MERCURY ONTO A SURFACE AT A RATE IN THE ORDER OF 50 ANGSTROMS PER SECOND, SAID SURFACE BEING AT A TEMPERATURE IN THE RANGE FROM 75* C. TO 150* C., AND ANNEALING SAID COMPOUND SO FORMED IN A VACUUM OF AT LEAST 5X10-6 MILIMETERS OF MERCURY AT SUBSTANTIALLY 200* C. FOR A PERIOD OF SUBSTANTIALLY SIX HOURS.
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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |