US3179808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive transducer having predetermined output response
Assignee: Polaroid Corp
•
Filing: 1959-08-27
•
Granted: 1965-04-20
•
Expires: 1979-08-27
Abstract
No abstract record available.
Inventors
- 👤 David S Grey
- 👤 Peter H Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4228; G01T; G01T1/00; G01T1/16; G01T1/26; G06; G06G; G06G7/00; G06G7/12; G06G7/24; H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0041; H03G1/0047; H03G7/00; H03G7/002; H03G7/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A TRANSDUCER DEVICE COMPIRISING, IN COMBINATION: (A) AN ELECTRICAL NETWORK CONSTRUCTED AND ARRANGED TO HAVE A VARIABLE CURRENT FLOWING THEREIN; (B) A PAIR OF PHOTOSENSITIVE TRANSDUCER PORTIONS DISPOSED FOR EXPOSURE TO A COMMON SOURCE OF LIGHT, EACH OF SAID PORTIONS HAVING AN ELECTRICAL PROPERTY WHOSE MAGNITUDE IS FUNCTIONALLY RELATED TO THE LEVEL OF BRIGHTNESS OF SAID SOURCE; (C) MEANS FOR SO CONNECTING SAID PORTIONS IN SAID NETWORK THAT THE LEVEL OF CURRENT FLOWING THEREIN IS AUTOMATICALLY CONTROLLED BY THE ELECTICAL PROPERTIES OF SAID PORTIONS AND VARIES IN MAGNITUDE IN ACCORDANCE WITH CHANGES IN THE BRIGHTNESS LEVEL OF SAID SOURCE OF LIGHT OVER A PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS; (D) AND MEANS OPERATIVELY ASSOCIATED WITH SAID PORTIONS FOR CAUSING VARIATIONS IN THE MAGNITUDE OF SAID CURRENT TO DEPEND PRIMARILY ON THE MAGNITUDE OF THE ELECTRICAL PROPERTY OF ONE SAID PORTIONS OVER ONE PART OF SAID PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS AND ON THE MAGNITUDE OF THE ELECTRICAL PROPERTY OF THE OTHER OF SAID PORTIONS OVER ANOTHER PART OF SAID PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS.
Claim 2
Dependent Claim
176 words
A TRANSDUCER DEVICE COMPIRISING, IN COMBINATION: (A) AN ELECTRICAL NETWORK CONSTRUCTED AND ARRANGED TO HAVE A VARIABLE CURRENT FLOWING THEREIN; (B) A PAIR OF PHOTOSENSITIVE TRANSDUCER PORTIONS DISPOSED FOR EXPOSURE TO A COMMON SOURCE OF LIGHT, EACH OF SAID PORTIONS HAVING AN ELECTRICAL PROPERTY WHOSE MAGNITUDE IS FUNCTIONALLY RELATED TO THE LEVEL OF BRIGHTNESS OF SAID SOURCE; (C) MEANS FOR SO CONNECTING SAID PORTIONS IN SAID NETWORK THAT THE LEVEL OF CURRENT FLOWING THEREIN IS AUTOMATICALLY CONTROLLED BY THE ELECTICAL PROPERTIES OF SAID PORTIONS AND VARIES IN MAGNITUDE IN ACCORDANCE WITH CHANGES IN THE BRIGHTNESS LEVEL OF SAID SOURCE OF LIGHT OVER A PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS; (D) AND MEANS OPERATIVELY ASSOCIATED WITH SAID PORTIONS FOR CAUSING VARIATIONS IN THE MAGNITUDE OF SAID CURRENT TO DEPEND PRIMARILY ON THE MAGNITUDE OF THE ELECTRICAL PROPERTY OF ONE SAID PORTIONS OVER ONE PART OF SAID PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS AND ON THE MAGNITUDE OF THE ELECTRICAL PROPERTY OF THE OTHER OF SAID PORTIONS OVER ANOTHER PART OF SAID PREDETERMINED RANGE OF LEVELS OF BRIGHTNESS.
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |