US3304433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive logic circuitry utilizing light pipe
Assignee: General Dynamics Corp
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Filing: 1964-08-26
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Granted: 1967-02-14
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Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Omer F Hamann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
LOGIC CIRCUITRY COMPRISING, A LIGHT PIPE CONTAINING PHOTOCHROMIC SUBSTANCES AT A PLURALITY OF LOCATIONS ALONG SAID PIPE, SAID PIPE HAVING A FIRST AND SECOND END, A LIGHT SOURCE POSITIONED ADJACENT TO ONE END OF SAID LIGHT PIPE FOR INSERTING LIGHT INTO SAID PIPE, MEANS POSITIONED ADJACENT TO THE OTHER END OF SAID PIPE FOR DETECTING THE STRENGTH OF THE LIGHT GENERATED BY SAID LIGHT SOURCE AND EMERGING FROM SAID PIPE, MEANS FOR EXPOSING AT LEAST ONE SECTION OF SAID PIPE CONTAINING SAID PHOTOCHROMIC SUBSTANCES TO ELECTROMAGNETIC RADIATION HAVING A FREQUENCY HIGHER THAN THE FREQUENCY OF SAID LIGHT GENERATED BY SAID LIGHT SOURCE AND FOR CAUSING SAID PHOTOCHROMIC SUBSTANCES TO AT LEAST PARTIALLY ABSORB SAID LIGHT GENERATED BY SAID LIGHT SOURCE THEREBY TO CHANGE THE INTENSITY OF THE LIGHT DETECTED BY SAID PHOTOELECTRIC DETECTOR.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |