US3628962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive polyamide compositions
Assignee: TI Gotham Inc
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Filing: 1970-06-17
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Granted: 1971-12-21
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Expires: 1990-06-17
Abstract
Abstract Photosensitive compositions and printing plates formed therefrom wherein nylon is rendered photosensitive by the admixture therewith of a difunctional photoinitiator containing two nonadjacent or nonvicinal keto groups.
Inventors
- 👤 Margaret H Murray
- 👤 Robert M Leekley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0387; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/107; Y10S430/114; Y10S430/124
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
The photosensitive composition defined by claim 1 wherein the amount of difunctional photoinitiator is from about 0.7 to about 6 parts by weight per 100 parts by weight of the polyamide.
Claim 2
Dependent Claim
14 words
The photosensitive composition defined by claim 1 wherein the difunctional photoinitiator is m-benzoyl benzophenone.
Claim 3
Dependent Claim
14 words
The photosensitive composition defined by claim 1 wherein the difunctional photoinitiator is p,p''-dibenzoyl diphenyloxide.
Claim 4
Dependent Claim
19 words
The photosensitive composition defined by claim 1 wherein the difunctional photoinitiator is ethylene glycol ester of p-benzoyl benzoic acid.
Claim 5
Dependent Claim
19 words
The photosensitive composition defined by claim 1 wherein the difunctional photoinitiator is diethylene glycol ester of p-benzoyl benzoic acid.
Claim 6
Dependent Claim
14 words
The photosensitive composition defined by claim 1 wherein the polyamide is an N-methoxymethylated polyamide.
Claim 7
Dependent Claim
14 words
The photosensitive composition defined by claim 1 wherein the polyamide is an N-hydroxyethyl polyamide.
Claim 8
Dependent Claim
17 words
A photosensitive printing plate having the photosensitive composition defined by claim 1 as a photosensitive component thereof.
References Cited (Backward Citations)
CA610596A
Cited
US2997391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |