US3718474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layers crosslinkable by light
Assignee: ANACONDA ACQUISITION Co
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Filing: 1971-04-05
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Granted: 1973-02-27
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Expires: 1991-04-05
Abstract
Abstract Soluble polymeric cyclopentadienes form particularly desirable light-sensitive layers, being crosslinked to insoluble condition by light with or without the help of a crosslinking agent.
Inventors
- 👤 G Kolb
- 👤 A Schmidt
- 👤 Josten R Schmitz
- 👤 E Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0384; G03F7/008; G03F7/012; G03F7/0125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
The combination of claim 1 in which the polymer is a polymer of cyclopentadiene, methyl-cyclopentadiene or dimethyl-cyclopentadiene.
Claim 2
Dependent Claim
28 words
The combination of claim 1 in which the layer also contains as light-sensitive crosslinking agent a low molecular weight benzene azido compound containing at least two azide groups.
Claim 3
Dependent Claim
59 words
In an exposure assembly for imagewise exposing a layer of a solid soluble copolymer that becomes crosslinked to insoluble condition where light struck, the improvement according to which the soluble copolymer has a molecular weight of about 5,000 to 1, 500,000, is a copolymer of cyclopentadiene with a styrene, and contains about 30 to 70 mol percent of cyclopentadiene.
Claim 4
Dependent Claim
60 words
In an exposure assembly for imagewise exposing a layer of a solid solution copolymer that becomes crosslinked to insoluble condition where light struck, the improvement according to which the soluble copolymer has a molecular weight of about 5,000 to 1, 500,000, is a copolymer of cyclopentadiene with indene or acenaphthylene, and contains about 30 to 70 mol percent of cyclopentadiene.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |