Patent US663732A successfully refreshed from Google Patents.
Patent US3856523A successfully refreshed from Google Patents.
US3856523A
Expired / Lapsed
US
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Process for preparing lithographic plates
Assignee: Pharmacia and Upjohn Co
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Filing: 1973-11-12
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Granted: 1974-12-24
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Expires: 1993-11-12
Abstract
Abstract Hydrophobic radiation-sensitive polymers are provided which are characterized by the recurring unit:
Inventors
- 👤 A Broggi
- 👤 H Ulrich
- 👤 F Stuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:20
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/012; C; C08; C08F; C08F8/00; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF A HYDROPHOBIC PRINTING MASTER WHICH IS RECEIVE OF OLEPHILE INKS WHICH COMPRISES A. APPLYING TO A SUBSTRATE A LAYER OF A HYDROPHOBIC RADIATIONSENSITIVE POLYMER CHARACTERZED BY A RECURRING UNIT OF THE FORMULA:
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF A HYDROPHOBIC PRINTING MASTER WHICH IS RECEIVE OF OLEPHILE INKS WHICH COMPRISES A. APPLYING TO A SUBSTRATE A LAYER OF A HYDROPHOBIC RADIATIONSENSITIVE POLYMER CHARACTERZED BY A RECURRING UNIT OF THE FORMULA:
Claim 3
Dependent Claim
25 words
The process of claim 2 wherein the substrate is an etchable metal wherein said coated substrate, after development of the image, is subjected to etching.
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein the hydrophobic radiation-sensitive polymer employed in step (a) is characterized by a recurring unit in which the group A is dodecylene.
Claim 5
Dependent Claim
39 words
A process according to claim 1 wherein the hydrophobic radiation-sensitive polymer employed in step (a) is characterized by a recurring unit in which the group R1 is methoxy, one of R2 and R3 is hydrogen and the other represents
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |