US2772972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive diazotype printing plates
Assignee: GAF Chemicals Corp
•
Filing: 1954-08-20
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Granted: 1956-12-04
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Clifford E Herrick
- 👤 Jr Peter T Woitach
- 👤 Edward J Trojnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PLATE CAPABLE OF CONVERSION TO AN OFFSET PRINTING PLATE COMPRISING A BASE, A HYDROPHOBIC LAYER ON SAID BASE COMPRISING ESSENTIALLY A COPOLYMER OF VINYL METHYL ETHER SAID MALEIC ANHYDRIDE ON SAID BASE AND AN OVERCOATING ON SAID HYDROPHOBIC LAYER OF A WATER-INSOLUBLE, ALKALI-RESISTANT ADHESIVE RESIN AND A LIGHT-SENSITIVE, WATER-INSOLUBLE DIAZO OXIDE WHICH IS SOLUBLE IN A SOLVENT SELECTED FROM THE CLASS CONSISTING OF LIQUID ALIPHATIC ESTERS, ALIPHATIC KETONES AND ALIPHATIC ALCOHOLS.
Claim 2
Dependent Claim
72 words
A PLATE CAPABLE OF CONVERSION TO AN OFFSET PRINTING PLATE COMPRISING A BASE, A HYDROPHOBIC LAYER ON SAID BASE COMPRISING ESSENTIALLY A COPOLYMER OF VINYL METHYL ETHER SAID MALEIC ANHYDRIDE ON SAID BASE AND AN OVERCOATING ON SAID HYDROPHOBIC LAYER OF A WATER-INSOLUBLE, ALKALI-RESISTANT ADHESIVE RESIN AND A LIGHT-SENSITIVE, WATER-INSOLUBLE DIAZO OXIDE WHICH IS SOLUBLE IN A SOLVENT SELECTED FROM THE CLASS CONSISTING OF LIQUID ALIPHATIC ESTERS, ALIPHATIC KETONES AND ALIPHATIC ALCOHOLS.
References Cited (Backward Citations)
US2667415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |