US3130051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing negative working offset diazo printing plates
Assignee: GAF Chemicals Corp
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Filing: 1958-12-10
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Granted: 1964-04-21
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Expires: 1978-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Clifford E Herrick
- 👤 Chebiniak Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS OF PRODUCING A NEGATIVE OFFSET PRINTING PLATE FROM A PLATE COMPRISING A BASE, A HYDROPHOLIC FILM OF A COPOLYMER OF A VINYL ALKYL ETHER AND MALEIC ANHYDRIDE ON SAID BASE, AND AN OVERCOATING ON SAID FILM OF A LIGHT-SENSITIVE, WATER-SOLUBLE DIAZONIUM COMPOUND WHICH BECOMES INSOLUBILIZED AND INK-RECEPTIVE IN AREAS EXPOSED TO LIGHT, SAID COMPOUND BEING SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FORMULAE:
Claim 2
Dependent Claim
67 words
THE PROCESS OF PRODUCING A NEGATIVE OFFSET PRINTING PLATE FROM A PLATE COMPRISING A BASE, A HYDROPHOLIC FILM OF A COPOLYMER OF A VINYL ALKYL ETHER AND MALEIC ANHYDRIDE ON SAID BASE, AND AN OVERCOATING ON SAID FILM OF A LIGHT-SENSITIVE, WATER-SOLUBLE DIAZONIUM COMPOUND WHICH BECOMES INSOLUBILIZED AND INK-RECEPTIVE IN AREAS EXPOSED TO LIGHT, SAID COMPOUND BEING SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FORMULAE:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |