Patent US4550198A successfully refreshed from Google Patents.
Patent US3103318A successfully refreshed from Google Patents.
US3103318A
Expired / Lapsed
US
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Automatic controls for winding and rewinding reels for recording tapes
Assignee: Individual
•
Filing: 1961-11-08
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Granted: 1963-09-10
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Expires: 1981-11-08
Abstract
No abstract record available.
Inventors
- 👤 Edward Norman Van Duyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:46
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/44; G11B15/02; G11B15/05; G11B15/06; G11B15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE COMBINATION WITH A REEL FOR WINDING AND UNWINDING AN OPAQUE RECORDING TAPE, AN ELECTRIC MOTOR FOR DRIVING SAID REEL, A PLURALITY OF SOURCES OF LIGHT, A LIGHT RESPONSIVE CELL ALIGNED WITH EACH OF SAID SOURCES, SAID TAPE BEING INTERPOSED BETWEEN SAID SOURCES AND SAID CELLS, SAID TAPE BEING PROVIDED WITH A TRANSPARENT POLARIZED AREA ON A SELECTED PORTION OF SAID TAPE, ONE OF SAID CELLS HAVING A POLARIZED LENS ADAPTED TO OBSTRUCT LIGHT RAYS PASSING THROUGH SAID POLARIZED AREA, ANOTHER OF SAID CELLS
Claim 2
Dependent Claim
84 words
THE COMBINATION WITH A REEL FOR WINDING AND UNWINDING AN OPAQUE RECORDING TAPE, AN ELECTRIC MOTOR FOR DRIVING SAID REEL, A PLURALITY OF SOURCES OF LIGHT, A LIGHT RESPONSIVE CELL ALIGNED WITH EACH OF SAID SOURCES, SAID TAPE BEING INTERPOSED BETWEEN SAID SOURCES AND SAID CELLS, SAID TAPE BEING PROVIDED WITH A TRANSPARENT POLARIZED AREA ON A SELECTED PORTION OF SAID TAPE, ONE OF SAID CELLS HAVING A POLARIZED LENS ADAPTED TO OBSTRUCT LIGHT RAYS PASSING THROUGH SAID POLARIZED AREA, ANOTHER OF SAID CELLS
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |