Patent US3687663A successfully refreshed from Google Patents.
US3687663A
Expired / Lapsed
US
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Diazo-oxides of sulfonic acid amides and/or esters and photographic element and use thereof
Assignee: Industrial Dyestuff Co
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Filing: 1970-05-19
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Granted: 1972-08-29
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Expires: 1990-05-19
Abstract
Abstract DIAZO-OXIDES OF SULFONIC ACID AMIDES AND/OR ESTERS CONTAINING A PLURALITY OF AROMATIC ETHER GROUPS, E.G. THE BIS-DIAZO-OXIDE OF NAPHTHALENE SULFONIC ACID AMIDE OF THE P-AMINOPHENYL DIETHER OF BISPHENOL A, AND THEIR USE IN PRINTING PLATES, ELECTRONICS, AND OTHER FIELDS WHICH ARE LIGHT-SENSITIVE MATERIALS. UPON EXPOSURE THROUGH A TRANSPARENCY THE DIAZO-OXIDES DECOMPOSE AND THE DECOMPOSITION PRODUCTS CAN BE REMOVED BY ALKALI. WHERE THE DIAZOOXIDE HAS NOT BEEN EXPOSED AND DECOMPOSED THE PLATE WILL ACCEPT PRINTING INK SO AS TO BE ABLE TO PRINT LARGE NUMBERS OF POSITIVE REPRODUCTIONS OF THE ORIGINAL TRANSPARENCY, OR IT MAY RESIST THE ACTION OF ETCHANTS.
Inventors
- 👤 Albert Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |