Patent US3554751A successfully refreshed from Google Patents.
US3554751A
Expired / Lapsed
US
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Presensitized positive-working lithographic plate and method for making same
Assignee: Imperial Metal and Chemical Co
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Filing: 1968-10-08
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Granted: 1971-01-12
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Expires: 1988-10-08
Abstract
Abstract A POSITIVE-WORKING LITHOGRAPHIC PLATE UTILIZING IN ITS LIGHT-SENSITIVE SURFACE THE REACTION PRODUCT OF A LIGHT-SENSITIVE DIAZO RESIN AND A NAPHTHALENE SULFONIC REACTANT. THE DIAZO RESIN IS APPLIED TO THE PLATE SUPPORT FIRST, AND THEN THE NAPHTHALENE SULFONIC COMPOUND.
Inventors
- 👤 Daniel C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:30
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |