US3775131A
Expired / Lapsed
US
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Diazonium compounds and diazotype materials containing them
Assignee: Canon Production Printing Holding BV
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Filing: 1971-06-01
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Granted: 1973-11-27
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Expires: 1991-06-01
Abstract
Abstract New light-sensitive benzene diazonium compounds are provided, which have a halogen atom in an ortho position relative to the diazonium group, an alkylthio in meta position and a dialkyl, alkylcycloalkyl or alkylaralkyl tertiary amino group in para position. These compounds are especially useful in one-component diazotype materials to be developed by liquid phloroglucinol developers, as they have high coupling activity and they form images of black or dark brown azo dyestuffs having light backgrounds, improved water fastness and high absorptiveness to ultraviolet radiation.
Inventors
- 👤 M Hendriks
- 👤 G Crommentuyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
36 words
A diazonium salt according to claim 1 carrying in successive vicinal positions a diazonium group, a chlorine atom, an alkylthio group and a dialkyl-amino group each alkyl constituent of which contains at most two carbon atoms.
Claim 2
Dependent Claim
23 words
A diazonium salt according to claim 1, selected from the group consisting of chlorozincate, 4-dimethylamino-3-isobutylthio-2-chloro benzene diazonium chlorostannate, and 4-(methyl-benzyl)amino-3-ethylthio-6-chloro benzene diazonium chlorozincate.
Claim 3
Dependent Claim
28 words
One-component diazotype material comprising a support having thereon a coating comprising a light-sensitive diazonium salt according to claim 1 in the substantial absence of an azo coupling component.
Claim 4
Dependent Claim
28 words
One-component diazotype material comprising a support having thereon a coating comprising a light-sensitive diazonium salt according to claim 2 in the substantial absence of an azo coupling component.
Claim 5
Dependent Claim
28 words
One-component diazotype material comprising a support having thereon a coating comprising a light-sensitive diazonium salt according to claim 3 in the substantial absence of an azo coupling component.
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |