Patent US3620748A successfully refreshed from Google Patents.
US3620748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-vinyl amine/halogen liberating composition sensitized with 9-vinyl carbazoles or polyacenes, or transannular peroxides of polyacenes
Assignee: Horizons Research Inc
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Filing: 1966-01-07
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Granted: 1971-11-16
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Expires: 1986-01-07
Abstract
Abstract The photographic response of compositions comprising mixtures of (1) N-vinyl carbazole (or other N-vinyl amine) and (2) CBr4 (or other organic halogen compound) to radiant energy having wavelengths longer than 4,500 A. is enhanced so as to include a response to radiant energy having wavelengths of up to about 7,000 A. by adding a slightly colored visible light sensitizer to the mixture.
Inventors
- 👤 Harry L Fichter Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029; G03F7/0295; Y; Y10; Y10S; Y10S430/00; Y10S430/145
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
The composition of claim 1 in which for each 1,000 parts by weight of N-vinyl amine monomer there are between 500 and 5,000 parts by weight of organic halogen compound and between 0.1 and 2.0 parts by weight of sensitizer.
Claim 2
Dependent Claim
27 words
The composition of claim 1 in which the organic halogen compound is one in which at least three bromine atoms are attached to a single carbon atom.
Claim 3
Dependent Claim
13 words
The composition of claim 3 in which the organic halogen compound is CBr4.
Claim 4
Dependent Claim
15 words
The composition of claim 1 in which the N-vinyl amine monomer compound is N-vinyl carbazole.
Claim 5
Dependent Claim
40 words
In the process of photopolymerization of N-vinyl amine monomers which comprises exposing an N-vinyl amine monomer to a suitable does of visible radiation, the improvement which comprises exposing a composItion according to claim 1 to said dosage of visible light.
Claim 6
Dependent Claim
31 words
The process of claim 8 including in addition the step of heat developing the polymeric image resulting from exposure to visible light by exposing said image to infrared at 130*-150* C.
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) | 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 |