US3776735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive copying composition containing a light insensitive polymer and a light sensitive heterocyclic compound
Assignee: Kalle GmbH and Co KG
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Filing: 1971-12-28
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Granted: 1973-12-04
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Expires: 1991-12-28
Abstract
Abstract The invention relates to a light-sensitive copying composition comprising a high molecular weight light-insensitive polymer and a light-sensitive nitrogen compound containing at least one sixmembered N-heterocyclic nucleus and at least one benzene nucleus.
Inventors
- 👤 H Frass
- 👤 S Bauer
- 👤 H Sikora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:30
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0045; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
27 words
A copying composition according to claim 1, in which the light-sensitive nitrogen compound is an acridine, or a 2,3-diphenyl quinoxaline substituted by methoxy groups, or a phenazine.
Claim 2
Dependent Claim
18 words
A copying composition according to claim 1, in the form of a solid light-sensitive layer upon a support.
Claim 3
Dependent Claim
23 words
A copying composition according to claim 3, in which the layer has a top layer of low oxygen permeability on its exposed surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |