US2841492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical reproduction
Assignee: Mccorquodale-Gresham Inc
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Filing: 1954-05-24
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Granted: 1958-07-01
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Gresham Donald Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A PROFESS FOR THE PRODUCTION OF A NEGATIVE COLOR SEPARATION SCREEN REPRODUCTION MODIFIED TO REDUCE THE DOT AREA OF SAID REPRODUCTION IN THE AREAS CORESPONDING TO THE BALACK OR DARKER AREAS OF THE ORIGINAL SUBJECT, WHICH COMPRISES FORMING A POSITIVE SCREEN RECORD (A) OF THE WHOLE RESPONSE OF THE ORIGINAL IN ONE WAVEBAND SELECTED FROM BLUE, GREEN AND RED WAVEBANDS, FORMING A POSITIVE SCREEN RECORD (B) OF THE WHOLE RESPONSE OF THE ORIGINAL IN ANOTHER DIFFERNT WAVEBAND SELECTED FROM BLUE GREEN AND RED WAVEBANDS, FORMING AS POSITIVE SCREEN RECORD (C) OF THE BLACK AREAS ONLY OF THE ORIGINAL, FORMING A NEGATIVE RECORD (D) BY PRINTING (B) AND (C) SUCCESSIVELY IN REGISTER IN A SINGLE SHEET OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL AND FORMING A NEGATIVE RECORD (E) BY PRINTING (A) AND (D) SUCCESSIVELY IN REGISTER ON A SINGLE SHEET OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL THE SAID RECOREDS (A), (B) AND (C) BEING MADE AT A DIFFERENT SCREEN ANGLES AND THE SAID NEGATIVE RECORD (E) CONSTITUTING THE PRODUCT REQUIRED.
Claim 2
Dependent Claim
165 words
A PROFESS FOR THE PRODUCTION OF A NEGATIVE COLOR SEPARATION SCREEN REPRODUCTION MODIFIED TO REDUCE THE DOT AREA OF SAID REPRODUCTION IN THE AREAS CORESPONDING TO THE BALACK OR DARKER AREAS OF THE ORIGINAL SUBJECT, WHICH COMPRISES FORMING A POSITIVE SCREEN RECORD (A) OF THE WHOLE RESPONSE OF THE ORIGINAL IN ONE WAVEBAND SELECTED FROM BLUE, GREEN AND RED WAVEBANDS, FORMING A POSITIVE SCREEN RECORD (B) OF THE WHOLE RESPONSE OF THE ORIGINAL IN ANOTHER DIFFERNT WAVEBAND SELECTED FROM BLUE GREEN AND RED WAVEBANDS, FORMING AS POSITIVE SCREEN RECORD (C) OF THE BLACK AREAS ONLY OF THE ORIGINAL, FORMING A NEGATIVE RECORD (D) BY PRINTING (B) AND (C) SUCCESSIVELY IN REGISTER IN A SINGLE SHEET OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL AND FORMING A NEGATIVE RECORD (E) BY PRINTING (A) AND (D) SUCCESSIVELY IN REGISTER ON A SINGLE SHEET OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL THE SAID RECOREDS (A), (B) AND (C) BEING MADE AT A DIFFERENT SCREEN ANGLES AND THE SAID NEGATIVE RECORD (E) CONSTITUTING THE PRODUCT REQUIRED.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |