Patent US3202042A successfully refreshed from Google Patents.
US3202042A
Expired / Lapsed
US
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System for measuring separately background and average line luminance or density
Assignee: Individual
•
Filing: 1962-08-06
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Granted: 1965-08-24
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Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jamieson Ballard
- 👤 Kee Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:20
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A SYSTEM FOR MEASURING SEPARATELY THE AVERAGE LINE LUMINANCE AND BACKGROUND LUMINANCE OF MATERIAL, BOTH BEING IMAGES OF LINEWORK OR TEXT, MEANS FOR ILLUMINATING SAID MATERIAL, MEANS FOR OPTICALLY SCANNING SAID MATERIAL, SIGNAL GENERATING MEANS RESPONSIVE TO THE LIGHT OUTPUT OF THE SCANNING MEANS FOR PROVIDING A SERIES OF ELECTRICAL PULSES, FIRST MEANS FOR PROVIDING AN OUTPUT HAVING A MAGNITUDE DEPENDENT UPON THE NUMBER OF PULSES IN SAID SERIES HAVING A VALUE EXCEEDING A FIRST SELECTED LEVEL, SECOND MEANS FOR PROVIDING AN OUTPUT A MAGNITUDE DEPENDENT UPON THE NUMBER OF PULSES IN SAID SERIES HAV-
Claim 2
Dependent Claim
96 words
IN A SYSTEM FOR MEASURING SEPARATELY THE AVERAGE LINE LUMINANCE AND BACKGROUND LUMINANCE OF MATERIAL, BOTH BEING IMAGES OF LINEWORK OR TEXT, MEANS FOR ILLUMINATING SAID MATERIAL, MEANS FOR OPTICALLY SCANNING SAID MATERIAL, SIGNAL GENERATING MEANS RESPONSIVE TO THE LIGHT OUTPUT OF THE SCANNING MEANS FOR PROVIDING A SERIES OF ELECTRICAL PULSES, FIRST MEANS FOR PROVIDING AN OUTPUT HAVING A MAGNITUDE DEPENDENT UPON THE NUMBER OF PULSES IN SAID SERIES HAVING A VALUE EXCEEDING A FIRST SELECTED LEVEL, SECOND MEANS FOR PROVIDING AN OUTPUT A MAGNITUDE DEPENDENT UPON THE NUMBER OF PULSES IN SAID SERIES HAV-
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) | 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 |