US3637375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerization utilizing diazosulfonates and photoreducible dyes
Assignee: Individual
•
Filing: 1970-05-25
•
Granted: 1972-01-25
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Expires: 1990-05-25
Abstract
Abstract Polymerization of ethylenically unsaturated vinyl compounds is effected by exposing such compounds to light in the presence of a photoinitiator comprising a combination of a light-sensitive diazosulfonate and a photoreducible dye. The further addition of amines and aldehyde/bisulfite addition products accelerates the polymerization reaction.
Inventors
- 👤 Steven Levinos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:09
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
3 words
a photoreducible dye.
Claim 2
Dependent Claim
22 words
The composition of claim 1 including a polymerization accelerator selected from primary, secondary, or tertiary aliphatic or aromatic amines or their salts.
Claim 3
Dependent Claim
14 words
The composition of claim 2 including a polymerization accelerator selected from aldehyde/bisulfite addition products.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein said diazosulfonate is derived from a p-phenylene diamine and bears a substituent meta to the diazo group.
Claim 5
Dependent Claim
22 words
A photoimaging material comprising: a. a support; and b. a coating on said support of a photopolymerizable composition according to claim 1.
Claim 6
Dependent Claim
16 words
Photoimaging material according to claim 5 wherein said composition includes a distinctly colored pigment or dye.
Claim 7
Dependent Claim
13 words
Photoimaging material according to claim 5 wherein said composition includes a water-dispersable binder.
Claim 8
Dependent Claim
53 words
A photoimaging process comprising: a. exposing material according to claim 5 imagewise to light for a time sufficient to effect polymerization in the light-exposed areas of said composition; and b. effecting a separation between the exposed, polymerized and unexposed, unpolymerized areas of said coating, thereby forming an image defining said imagewise light exposure.
Claim 9
Dependent Claim
18 words
The process according to claim 8 wherein said separation is effected by washing unexposed areas from said support.
Claim 10
Dependent Claim
21 words
The process according to claim 8 wherein said separation is effected by transferring one of said areas to a receiving surface.
References Cited (Backward Citations)
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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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |