Patent US3753715A successfully refreshed from Google Patents.
US3753715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerizable copying material
Assignee: Kalle GmbH and Co KG
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Filing: 1971-07-19
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Granted: 1973-08-21
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Expires: 1991-07-19
Abstract
Abstract This invention relates to a photopolymerizable copying material comprising a support, a photopolymerizable copying layer thereon containing a photoinitiator and a low molecular weight vinyl or vinylidene compound polymerizable by exposure to light, and a top layer only slightly permeable to oxygen and transparent to actinic light, said top layer containing, as an oxygen inhibitor, at least one low molecular weight film-forming compound soluble in water at 20* C.
Inventors
- 👤 K Klupfel
- 👤 U Elter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/092
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
A copying material according to claim 1 in which the top layer has a weight of about 0.5 to 5 g/m2.
Claim 2
Dependent Claim
13 words
A copying material according to claim 1 in which the carbohydrate is saccharose.
Claim 3
Dependent Claim
20 words
A copying material according to claim 1 in which the top layer comprises a mixture of saccharose and methyl cellulose.
Claim 4
Dependent Claim
21 words
A copying material according to claim 1 in which the carbohydrate is saccharose which has been briefly heated to 190* C.
Claim 5
Dependent Claim
13 words
A copying material according to claim 1 in which the carbohydrate is sucrose.
Claim 6
Dependent Claim
13 words
A copying material according to claim 1 in which the carbohydrate is sorbitol.
Claim 7
Dependent Claim
16 words
A copying material according to claim 1 in which the top layer contains a wetting agent.
Claim 8
Dependent Claim
14 words
A copying material according to claim 8 in which the wetting agent is saponin.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |