Patent US3226253A successfully refreshed from Google Patents.
US3226253A
Expired / Lapsed
US
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Method of producing photosensitive layers of lead selenide
Assignee: International Standard Electric Corp
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Filing: 1961-08-03
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Granted: 1965-12-28
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Expires: 1981-08-03
Abstract
No abstract record available.
Inventors
- 👤 Gobrecht Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:39
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; C23C14/541; C23C14/06; Y; Y10; Y10S; Y10S148/00; Y10S148/063; Y10S148/064; Y10S148/15; Y10S148/158; Y10S148/169
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF PRODUCING PHOTOSENSITIVE LAYERS OF LEAD SELENIDE COMPRISING THE STEPS OF DISPOSING A BASE WITHIN A VACUUM CHAMBER, EVAPORATING LEAD SELENIDE AND PURE SELENIUM WITHIN SAID CHAMBER, SAID LEAD SELENDIDE BEING EVAPORATED AT A HIGHER TEMPERATURE THAN SAID
Claim 2
Independent Claim
40 words
THE METHOD OF PRODUCING PHOTOSENSITIVE LAYERS OF LEAD SELENIDE COMPRISING THE STEPS OF DISPOSING A BASE WITHIN A VACUUM CHAMBER, EVAPORATING LEAD SELENIDE AND PURE SELENIUM WITHIN SAID CHAMBER, SAID LEAD SELENDIDE BEING EVAPORATED AT A HIGHER TEMPERATURE THAN SAID
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |