Patent US3202827A successfully refreshed from Google Patents.
US3202827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocell for detecting limited moving shadow areas
Assignee: Cummins Chicago Corp
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Filing: 1961-06-29
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Granted: 1965-08-24
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Expires: 1981-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:00
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10841
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
OBJECT DETECTING AND SIGNAL GENERATING APPARATUS COMPRISING, IN COMBINATION, A VOLTAGE SOURCE, A PHOTOCELL HAVING A PAIR OF SPACED ELECTRODES AND A BROAD EXPOSED INTER-ELECTRODE AREA OF PHOTOSENSITIVE MATERIAL, SAID PHOTOCELL COUPLED TO SAID VOLTAGE SOURCE, A LIGHT SOURCE SPACED FROM SAID PHOTOCELL, A UTILIZATION DEVICE COUPLED TO SAID PHOTOCELL AND SAID VOLTAGE SOURCE, TRANSPARENT CARRIER MEANS FDOR SUPPORTING SAID OBJECT INTERMEDIATE SAID LIGHT SOURCE AND SAID PHOTOCELL, SAID CARRIER MEANS BEING POSITIONED RELATIVE TO SAID PHOTOCELL SO AS TO PROJECT A SHADOW OF THE OBJECT TOWARDS SAID PHOTOCELL WITH SAID SHADOW CUTTING ENTIRELY ACROSS THE LATTER, MEANS FOR EFFECTING RELATIVE MOVEMENT BETWEEN SAID CARRIER MEANS AND SAID PHOTOCELL
References Cited (Backward Citations)
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |