Patent US3622326A successfully refreshed from Google Patents.
US3622326A
Expired / Lapsed
US
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Diazotype light-sensitive copying papers intended for wet development and for use in the preparation of intermediates
Assignee: Ricoh Co Ltd
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Filing: 1968-03-20
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Granted: 1971-11-23
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Expires: 1988-03-20
Abstract
Abstract A diazo-type copying paper which is prepared by coating, on a light-transmitting base, a light-sensitive composite containing a diazonium compound obtained from 1-amino-4-dialkylaminomonochloro benzene and also containing a coupling component consisting of 2-alkyl-5-alkyl-4-morpholino-methyl-phenol, provides an excellent intermediate copy when developed according to the wet development process.
Inventors
- 👤 Shigeaki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:50
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/096; G; G03; G03C; G03C1/00; G03C1/52; G03C1/54; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A process according to claim 1, wherein said diazo compound is selected from the group consisting of 4-dimethylAmino-2-chloro-benzene diazonium compound, 4-dimethylamino-3-chloro-benzene diazonium compound, 4-diethylamino-2-chloro-benzene diazonium compound and 4-diethylamino-3-chloro-benzene diazonium compound.
Claim 2
Dependent Claim
24 words
A process according to claim 1, wherein said coupling component is selected from the group consisting of 2,5-dimethyl-4-morpholino-methyl-phenol, 2,5-diethyl-4-morpholino-methyl-phenol, 2,5-dipropyl-4-morpholino-methyl-phenol, 2,5-dibutyl-4-morpholino-methyl-phenol, 2-methyl-5-ethyl-4-morpholino-methyl-phenol and 2-ethyl-5-propyl-4-morpholino-methyl-phenol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |