US3523791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of thermographic copying
Assignee: Agfa Gevaert NV
•
Filing: 1966-06-22
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Granted: 1970-08-11
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Expires: 1986-06-22
Abstract
No abstract record available.
Inventors
- 👤 Marcel Nicolas Vrancken
- 👤 Alexander Riebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A METHOD OF RECORDING INFORMATION, COMPRISING THE STEPS OF PROVIDING A RECORDING MATERIAL INCLUDING A RECORDING LAYER, WHICH CONSISTS OF AT LEAST ABOUT 80% BY WEIGHT OF GELATIN AND CONTAINS HOMOGENEOUSLY DISTRIBUTED THEREIN A FINELY DIVIDED MATERIAL THAT ABSORBS VISIBLE LIGHT AND CONVERTS ABSORBED LIGHT INTO HEAT, SAID MATERIAL BEING PRESENT IN SUCH AN AMOUNT THAT AT LEAST 20% AND AT MOST 80% OF THE VISIBLE LIGHT TO WHICH THE ORIGINAL IS EXPOSED IS TRANSMITTED; REFLECTOGRAPHICALLY EXPOSING THE RECORDING LAYER WHILE IN DIRECT CONTACT WITH AN ORIGINAL HAVING VISIBLE LIGHT-ABSORBING MARKINGS ON A VISIBLE LIGHT-REFLECTING BACKGROUND FOR A TIME NOT LONGER THAN 10**1 SECONDS, SAID EXPOSURE BEING OF SUCH AN INTENSITY AS TO HEAT PORTIONS OF SAID RECORDING LAYER CORRESPONDING TO SAID BACKGROUND TO THE EXTENT THAT THE SWELLING RATE AND THE RATE OF DISSOLUTION IN WATER OF THE GELATIN ARE INCREASED BUT NOT OF SUCH INTENSITY AS TO HEAT PORTIONS OF SAID RECORDING LAYER CORRESPONDING TO SAID LIGHT-ABSORBING MARKINGS TO THE EXTENT THAT THE SWELLING RATE AND THE RATE OF DISSOLUTION IN WATER OF THE GELATIN ARE INCREASED, AND DEVELOPING THE IMAGE FORMED ON THE RECORDING LAYER BY SWELLING OR DISSOLVING THE HEATED PORTIONS OF THE GELATIN.
Claim 2
Independent Claim
198 words
A METHOD OF RECORDING INFORMATION, COMPRISING THE STEPS OF PROVIDING A RECORDING MATERIAL INCLUDING A RECORDING LAYER, WHICH CONSISTS OF AT LEAST ABOUT 80% BY WEIGHT OF GELATIN AND CONTAINS HOMOGENEOUSLY DISTRIBUTED THEREIN A FINELY DIVIDED MATERIAL THAT ABSORBS VISIBLE LIGHT AND CONVERTS ABSORBED LIGHT INTO HEAT, SAID MATERIAL BEING PRESENT IN SUCH AN AMOUNT THAT AT LEAST 20% AND AT MOST 80% OF THE VISIBLE LIGHT TO WHICH THE ORIGINAL IS EXPOSED IS TRANSMITTED; REFLECTOGRAPHICALLY EXPOSING THE RECORDING LAYER WHILE IN DIRECT CONTACT WITH AN ORIGINAL HAVING VISIBLE LIGHT-ABSORBING MARKINGS ON A VISIBLE LIGHT-REFLECTING BACKGROUND FOR A TIME NOT LONGER THAN 10**1 SECONDS, SAID EXPOSURE BEING OF SUCH AN INTENSITY AS TO HEAT PORTIONS OF SAID RECORDING LAYER CORRESPONDING TO SAID BACKGROUND TO THE EXTENT THAT THE SWELLING RATE AND THE RATE OF DISSOLUTION IN WATER OF THE GELATIN ARE INCREASED BUT NOT OF SUCH INTENSITY AS TO HEAT PORTIONS OF SAID RECORDING LAYER CORRESPONDING TO SAID LIGHT-ABSORBING MARKINGS TO THE EXTENT THAT THE SWELLING RATE AND THE RATE OF DISSOLUTION IN WATER OF THE GELATIN ARE INCREASED, AND DEVELOPING THE IMAGE FORMED ON THE RECORDING LAYER BY SWELLING OR DISSOLVING THE HEATED PORTIONS OF THE GELATIN.
References Cited (Backward Citations)
US3121162A
Cited
US3298833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |