Patent US3909269A successfully refreshed from Google Patents.
US3909269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic plate comprising a light-sensitive polymer
Assignee: Western Litho Plate and Supply Co
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Filing: 1973-11-13
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Granted: 1975-09-30
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Expires: 1993-11-13
Abstract
Abstract A light sensitive polymer, susceptible to crosslinking on exposure to actinic light. The polymer contains the recurring unit; R1, R2 and R3 are each selected from the group consisting of hydrogen, halogen and lower alkyl. At least one of R4 and R5 is an azidobenzoyloxy or azidonaphthoyloxy group. The other of R4 and R5 is selected from the group consisting of hydroxyl, halogen, alkoxy, aryloxy, aralkoxy, alkoxyalkoxy, aryloxyalkoxy, alkoxyaryloxy, aryloxyaryloxy, alkylacyloxy, arylacyloxy, alkenylacyloxy, aralkenylacyloxy, heterocyclic substituted alkenylacyloxy, azidobenzoyloxy and azidonaphthoyloxy.
Inventors
- 👤 Edward H Parker
- 👤 Edward M Harris
- 👤 Jim D Meador
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:49
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/012; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F8/00; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
31 words
A LITHORAHPIC PLATE WHICH COMPRISES A BASE PLATE HAVING A COATING ON THE SURFACE THEREOF COMPRISING A LIGHT-SENSATIVE POLYMER SUSCEPTABLE TO CROSSLINKING UPON EXPOSURE TO ACTINC LIGHT CONTAINING THE RECURRING UNIT:
Claim 2
Dependent Claim
31 words
A LITHORAHPIC PLATE WHICH COMPRISES A BASE PLATE HAVING A COATING ON THE SURFACE THEREOF COMPRISING A LIGHT-SENSATIVE POLYMER SUSCEPTABLE TO CROSSLINKING UPON EXPOSURE TO ACTINC LIGHT CONTAINING THE RECURRING UNIT:
Claim 3
Dependent Claim
21 words
A lithographic plate as set forth in claim 1 wherein said base plate is constituted by a thin sheet of aluminum.
Claim 4
Dependent Claim
17 words
A lithographic plate as set forth in claim 2 wherein said base plate is grained and anodized.
Claim 5
Dependent Claim
16 words
A lithographic plate as set forth in claim 3 wherein said base plate is electrochemically grained.
Claim 6
Dependent Claim
35 words
A process for preparing presensitized lithographic plates which comprises the steps of: preparing a mixture comprising a volatile solvent and a light-sensitive polymer susceptible to crosslinking upon exposure to actinic light containing the recurring unit:
Claim 7
Dependent Claim
35 words
A process for preparing presensitized lithographic plates which comprises the steps of: preparing a mixture comprising a volatile solvent and a light-sensitive polymer susceptible to crosslinking upon exposure to actinic light containing the recurring unit:
Claim 8
Dependent Claim
19 words
A process as set forth in claim 5 wherein said solvent is aqueous and said mixture is an emulsion.
Claim 9
Dependent Claim
17 words
A process as set forth in claim 5 wherein a sensitizer is also included in said solution.
Claim 10
Dependent Claim
67 words
A process as set forth in claim 5 wherein an exposed plate suitable for printing is prepared by the additional steps of: exposing the presensitized plate through a photographic negative to a source of actinic light for a time sufficient to photocrosslink said light-sensitive polymer in the areas exposed; and removing noncrosslinked polymer from the unexposed areas of the plate with a solvent for the noncrosslinked polymer.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |