Patent US3565629A successfully refreshed from Google Patents.
US3565629A
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US
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Two-component diazotype intermediate material
Assignee: Keuffel and Esser Co
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Filing: 1967-10-06
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Granted: 1971-02-23
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Expires: 1987-10-06
Abstract
Abstract DIAZOTYPE INTERMEDIATE MATERIAL PROVIDING IMAGES OF GOOD ACTINIC OPACITY AND VISIBLE CONTRAST IS PREPARED BY COMBINING ALKYL ARALKYL AMINO BENZENE DIAZONIUM DERIVATIVES WITH HYDROXYL BENZOIC ACID- ORPHENYLUREA-DERIVATIVE AND NAPHTHOIC ACID AMIDE-DERIVATIVE AZO COUPLER COMPOUNDS, AND INCLUDING A SULFO-BENZOIC ACID-DERIVATIVE STABILIZER. THE RESULTING TWO-COMPONENT DIAZOTYPE MATERIAL, ALTHOUGH CONTAINING A FAST-DEVELOPING DIAZONIUM COMPOUND AND A BLUE-COUPLING COMPONENT, HAS REMARKABLE STORAGE STABILITY AND ACTINIC OPACITY.
Inventors
- 👤 Gerhard Usbeck
- 👤 Hellmut Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |