Patent US3887808A successfully refreshed from Google Patents.
US3887808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoimaging process utilizing a photochromic material containing a spiropyran, a polyhalogenated hydrocarbon, a thiol compound and a polyvinylcarbazole
Assignee: Agfa Gevaert NV
•
Filing: 1973-06-25
•
Granted: 1975-06-03
•
Expires: 1993-06-25
Abstract
Abstract A process for forming a dye image comprising the image-wise heating in the presence of minor amounts of visible light of a recording material containing an intimate mixture comprising: 1. AT LEAST ONE SPIROPYRAN COMPOUND, 2. AT LEAST ONE ULTRAVIOLET-RADIATION SENSITIVE COMPOUND CAPABLE OF PRODUCING ON EXPOSURE TO ULTRAVIOLET-RADIATION WITH THE SPIROPYRAN COMPOUND A DYE SALT, AND IN WORKING RELATIONSHIP WITH SAID MIXTURE A COMPOUND OR MIXTURE OF COMPOUNDS BELONGING TO ONE OF THE FOLLOWING CLASSES. A. AN ORGANIC NITROGEN-CONTAINING COMPOUND COMPRISING A THIOL GROUP OR IN ITS TAUTOMERIC FORM A THIONE GROUP AS REPRESENTED IN THE FOLLOWING TAUTOMERIC STRUCTURAL PARTS: B. A POLYMER CONTAINING N-vinylcarbazole units.
Inventors
- 👤 Den Houte Jozef Willy Van
- 👤 Royen Freddy Ghisleen Van
- 👤 Goethem Hugo Vital Van
- 👤 Edwin Hendrik Hazenbosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:02
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
49 words
A PROCESS FOR FORMING A DYE IMAGE COMPRISING APPLYING A HEAT PATTERN HAVING A TEMPERATURE OF AT LEAST 90*C OF THE IMAGE IN THE PRESENCE OF MINOR AMOUNTS OF ABOUT UP TO 20% OF VISIBLE LIGHT TO A RECORDING MATERIAL INCLUDING A RECORDING LAYER CONTAINING AN INTIMATE MIXTURE COMPRISING:
Claim 2
Dependent Claim
49 words
A PROCESS FOR FORMING A DYE IMAGE COMPRISING APPLYING A HEAT PATTERN HAVING A TEMPERATURE OF AT LEAST 90*C OF THE IMAGE IN THE PRESENCE OF MINOR AMOUNTS OF ABOUT UP TO 20% OF VISIBLE LIGHT TO A RECORDING MATERIAL INCLUDING A RECORDING LAYER CONTAINING AN INTIMATE MIXTURE COMPRISING:
Claim 3
Dependent Claim
34 words
AT LEAST ONE SPIROPYRAN COMPOUND OF THE GROUP CONSISTING OF A SPIRODIBENZOPYRAN, A SPIRODINAPHTHOPYRAN, A SPIROBENZONAPHTHOPYRAN, A 1,3,3TRIMETHYLINDOLINOBENZOSPIRROPYRAN, A 1,3,3TRIMETHYLINDOLINE-NAPHTHOSPIROPYRAN, OR A SPIROPYRAN THAT CONTAINS A CONDENSED AROMATIC NUCLEUS OF ANTHRACENE OR PHENANTHRENE, AND
Claim 4
Dependent Claim
34 words
AT LEAST ONE SPIROPYRAN COMPOUND OF THE GROUP CONSISTING OF A SPIRODIBENZOPYRAN, A SPIRODINAPHTHOPYRAN, A SPIROBENZONAPHTHOPYRAN, A 1,3,3TRIMETHYLINDOLINOBENZOSPIRROPYRAN, A 1,3,3TRIMETHYLINDOLINE-NAPHTHOSPIROPYRAN, OR A SPIROPYRAN THAT CONTAINS A CONDENSED AROMATIC NUCLEUS OF ANTHRACENE OR PHENANTHRENE, AND
Claim 5
Dependent Claim
49 words
A process for forming a dye image comprising applying a heat pattern having a temperature of at least 90*C of the image in the presence of minor amounts of about up to 20% of visible light to a recording material including a recording layer containing an intimate mixture comprising:
Claim 6
Dependent Claim
49 words
A process for forming a dye image comprising applying a heat pattern having a temperature of at least 90*C of the image in the presence of minor amounts of about up to 20% of visible light to a recording material including a recording layer containing an intimate mixture comprising:
Claim 7
Dependent Claim
34 words
at least one spiropyran compound of the group consisting of a spirodibenzopyran, a spirodinaphthopyran, a spirobenzonaphthopyran, a 1,3,3-trimethylindolinobenzospiropyran, a 1,3,3-trimethylindoline-naphthospiropyran, or a spiropyran that contains a condensed aromatic nucleus of anthracene or phenanthrene, and
Claim 8
Dependent Claim
34 words
at least one spiropyran compound of the group consisting of a spirodibenzopyran, a spirodinaphthopyran, a spirobenzonaphthopyran, a 1,3,3-trimethylindolinobenzospiropyran, a 1,3,3-trimethylindoline-naphthospiropyran, or a spiropyran that contains a condensed aromatic nucleus of anthracene or phenanthrene, and
Claim 9
Dependent Claim
27 words
at least one ultra-violet radiation-sensitive polyhalogen compound capable of producing on exposure with ultra-violet radiation with the spiropyran compound a dye salt and having the general formula:
Claim 10
Dependent Claim
27 words
at least one ultra-violet radiation-sensitive polyhalogen compound capable of producing on exposure with ultra-violet radiation with the spiropyran compound a dye salt and having the general formula:
Claim 11
Dependent Claim
27 words
AT LEAST ONE ULTRA-VIOLET RADIATION-SENSITIVE POLYHALOGEN COMPOUND CAPABLE OF PRODUCING ON EXPOSURE WITH ULTRAVIOLET RADIATION WITH THE SPIROPYRAN COMPOUND A DYE SALT AND HAVING THE GENERAL FORMULA:
Claim 12
Dependent Claim
27 words
AT LEAST ONE ULTRA-VIOLET RADIATION-SENSITIVE POLYHALOGEN COMPOUND CAPABLE OF PRODUCING ON EXPOSURE WITH ULTRAVIOLET RADIATION WITH THE SPIROPYRAN COMPOUND A DYE SALT AND HAVING THE GENERAL FORMULA:
Claim 13
Dependent Claim
42 words
A process according to claim 1, wherein the pattern-wise heating of the recording material proceeds by exposure thereof to infrared radiation and a minor amount of visible light while said layer is in heat-conductive contact with an original containing infrared-absorbing image markings.
Claim 14
Dependent Claim
20 words
A process according to claim 2, wherein the exposure to said infra-red radiation and visible light is a reflectographic exposure.
Claim 15
Dependent Claim
29 words
A process according to claim 3, wherein said layer is applied to a support transparent for infrared radiation and visible light and said exposure is made through said support.
Claim 16
Dependent Claim
35 words
A process according to claim 3, wherein said layer is applied to a support that is heat-conductive and said exposure is made through said layer while said support is in contact with said original markings.
Claim 17
Dependent Claim
13 words
A process according to claim 1, wherein the polyhalogen compound is carbon tetrabromide.
Claim 18
Dependent Claim
21 words
A process according to claim 1, wherein the polymer containing N-vinylcarbazole units is poly-N-vinylcarbazole serving as binding agent for said layer.
Claim 19
Dependent Claim
17 words
A process according to claim 1, wherein the layer contains also an amido, acylamino, or ureido compound.
Claim 20
Dependent Claim
38 words
A process according to claim 8, wherein said amido, acylamino or ureido compound corresponds to the following general formula: R1-CO-NH-R2 wherein: R1 represents an organic residue of the type present in a carboxylic acid chloride, a -NHR3 or
Claim 21
Dependent Claim
45 words
A process according to claim 1, wherein the material is preliminarily treated to stabilize the eventual dye image by uniformly heating the recording layer in the absence of visible light at a temperature of about 80*C and then treating it with perchloroethylene at room temperature.
Claim 22
Dependent Claim
28 words
A process according to claim 1, wherein the dye image is stabilized by dipping the exposed recording material in an inert organic liquid heated between 145* and 165*C.
Claim 23
Dependent Claim
16 words
The process of claim 1 wherein said spiropyran compound corresponds to one of the general formulae:
Claim 24
Dependent Claim
20 words
The process of claim 1 wherein said layer is pattern-wise heated to a temperature in the range of about 90*-150*C.
Claim 25
Dependent Claim
27 words
The process of claim 1 wherein said nitrogen compound is used in a ratio by weight of about 1:30 to about 1:1 relative to said spiropyran compound.
References Cited (Backward Citations)
US3451338A
Cited
US3359105A
Cited
US3642479A
Cited
US3810762A
Cited
US3820995A
Cited
US3785820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |