US3620740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermodiazo-type copying
Assignee: Agfa Gevaert NV
•
Filing: 1969-01-09
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Granted: 1971-11-16
•
Expires: 1989-01-09
Abstract
Abstract Diazo-type reproduction using as a latent diazonium coupling compound activable by heat an 3H-indolium compound.
Inventors
- 👤 Albert Lucien Poot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:11
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/60; C07D209/02; C07D209/04; C07D209/08; C07D293/00; C07D293/10; C07D293/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
A process according to claim 1, wherein a recording material containing a diazonium compound and a said quaternary heterocyclic nitrogen compound is exposed imagewise to ultraviolet radiation, and the exposed recording material is uniformly heated to release said coupler for reaction with the diazonium compound in the unexposed areas.
Claim 2
Dependent Claim
56 words
A process according to claim 1, wherein a recording material containing a diazonium compound and a said quaternary heterocyclic compound is exposed imagewise to heat to release said coupler for reaction in the image areas with said diazonium compound and the heat-exposed recording material is uniformly exposed to ultraviolet radiation to decompose the unreacted diazonium compound.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein the quaternary compound and the diazonium compound are applied to an absorbent sheet material.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein the quaternary compound and the diazonium compound are applied in a hydrophilic colloid to a water-impermeable transparent resin layer.
Claim 5
Dependent Claim
33 words
A process according to claim 1, wherein the recording material contains a wetting agent, an optical brightening agent, a pigment and/or an antioxidant in combination with the quaternary compound and the diazonium compound.
Claim 6
Dependent Claim
23 words
A process according to claim 1, wherein the recording material contains an acid in combination with the quaternary compound and the diazonium compound.
Claim 7
Dependent Claim
42 words
A process according to claim 1, wherein the quaternary compound is incorporated into an absorbent support material, shielded from intimate contact with the diazonium compound by a coating of a meltable resin, and said diazonium compound is applied over said resin coating.
Claim 8
Dependent Claim
35 words
A process according to claim 1, wherein the quaternary compound is encapsulated in a continuous water-impermeable meltable resin shell and the diazonium compound as well as the capsules are incorporated into a continuous hydrophilic binder.
Claim 9
Dependent Claim
35 words
A process according to claim 1, wherein the diazonium compound is encapsulated in a continuous water-impermeable meltable resin shell and the quaternary compound as well as the capsules are incorporated in a continuous hydrophilic binder.
Claim 10
Dependent Claim
19 words
A process according to claim 8, wherein the intermediate meltable layer is composed of rosin or an ester gum.
Claim 11
Dependent Claim
27 words
A diazo-type copying material containing a diazonium compound and as a latent heat-releasable azo coupling compound a quaternary heterocyclic nitrogen compound corresponding to the following general formula:
Claim 12
Dependent Claim
17 words
A diazo-type copying material according to claim 12, wherein said compounds are applied to a porous support.
Claim 13
Dependent Claim
20 words
A diazo-type copying material according to claim 12, wherein said compounds are applied in a binder to a transparent support.
Claim 14
Dependent Claim
40 words
A diazo-type copying material according to claim 12, wherein the diazonium compound and the quaternary compound are separated from coming into effective contact with each other by including only one of said compounds in a meltable layer or capsule shell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |