Patent US3239675A successfully refreshed from Google Patents.
US3239675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically immersed photoconductive cells
Assignee: Eastman Kodak Co
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Filing: 1962-12-17
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Granted: 1966-03-08
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Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Donald R Morey
- 👤 Sheldon Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:09
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/20; G01J5/22; G01J5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PHOTOSENSITIVE UNTI COMPRISING A LENS, THE FRONT SURFACE OF WHICH IS CONVEX, A PHOTOCONDUCTIVE ELEMENT AND A THIN FILM OF CEMENT ATTACHING SAID PHOTOCONDUCTIVE ELEMENT OF THE REAR SURFACE OF SID LENS, SAID CEMENT COMPRISING AN ANTIMONY OR ARSENIC COMPOUND HAVING A MELTING POINT ABOVE 200*C., INFRARED TRANSMISSION TO AT LEAST 10 MICRONS, HIGH ELECTRICAL RESISTIVITY AND A REFRACTIVE INDEX OF AT LEAST 2 AT ONE MICRON WAVELENGTH.
Claim 2
Dependent Claim
69 words
A PHOTOSENSITIVE UNTI COMPRISING A LENS, THE FRONT SURFACE OF WHICH IS CONVEX, A PHOTOCONDUCTIVE ELEMENT AND A THIN FILM OF CEMENT ATTACHING SAID PHOTOCONDUCTIVE ELEMENT OF THE REAR SURFACE OF SID LENS, SAID CEMENT COMPRISING AN ANTIMONY OR ARSENIC COMPOUND HAVING A MELTING POINT ABOVE 200*C., INFRARED TRANSMISSION TO AT LEAST 10 MICRONS, HIGH ELECTRICAL RESISTIVITY AND A REFRACTIVE INDEX OF AT LEAST 2 AT ONE MICRON WAVELENGTH.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |