US3337718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light scan recording and readout
Assignee: Xerox Corp
•
Filing: 1964-01-02
•
Granted: 1967-08-22
•
Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 David C Harper
- 👤 Raymond T Wright
- 👤 James E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/0938
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
AN OPTICAL DATA PROCESSING SYSTEM COMPRISING: (A) A FLYING SPOT SCANNER; (B) MEANS TO SUPPORT A PHOTOSENSITIVE RECORDING ELEMENT CARRYING PREPRINTED CLOCK TRACKS IN TWO FREQUENCIES; (C) PHOTO SENSING MEANS; (D) AN OPTICAL SYSTEM TO RELAY THE LIGHT SPOT FROM SAID SCANNER TO SAID RECORDING ELEMENT AND TO COLLECT THE LIGHT FROM SAID RECORDING ELEMENT ON SAID PHOTO SENSING MEANS; (E) MEANS TO SEPARATE FROM THE OUTPUT OF SAID PHOTO SENSING MEANS TWO CLOCK SIGNALS OBTAINED FROM CLOCK TRACKS PREPRINTED ON SAID ELEMENT; (F) A DIFFERENCE AMPLIFIER CONNECTED TO SAID MEANS TO SEPARATE FOR PROVIDING AN OUTPUT THAT IS A FUNCTION OF THE DIFFERENCE IN AMPLITUDE OF SAID TWO CLOCK SIGNALS;
References Cited (Backward Citations)
US2929956A
Cited
US3188477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |