US3778274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally sensitized diazo material
Assignee: Canon Inc
•
Filing: 1971-04-07
•
Granted: 1973-12-11
•
Expires: 1991-04-07
Abstract
Abstract A dithiocarbamate is mixed with a photolytic aromatic diazo compound to improve the intrinsic sensitivity and spectral sensitivity of the photosensitive material for diazo photography.
Inventors
- 👤 E Inoue
- 👤 T Yamase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/0166; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
40 words
A photosensitive material composition for diazo photography according to claim 1 in which the photolytic aromatic diazonium salt is a member selected from the group consisting of p-diazo mono (or di-) alkylaniline derivatives, 2, 5- disubstituted-4-diazo-N-acyl anilides, p-diazo diphenylamine derivatives.
Claim 2
Dependent Claim
77 words
A photosensitive material for diazo photography according to claim 1 in which the dithiocarbamate is a member selected from the group consisting of sodium methyldithiocarbamate, ammonium methylenedithiocarbamate, ethylammonium ethyldithiocarbamate, zinc dimethyldithiocarbamate, sodium octyldithiocarbamate, cyclohexylAmmonium cyclohexydithiocarbamate, cadmium cyclohexyldithiocarbamate, ammonium propenyldithiocarbamate, potassium octenyldithiocarbamate, sodium benzyldithiocarbamate, ammonium methylbenzyldithiocarbamate, ammonium naphthylmethyldithiocarbamate, ammonium phenyldithiocarbamate, diphenyldithiocarbamic acid, sodium diphenyldithiocarbamate, sodium piperidine-N-carbodithionate, sodium morpholine-N-carbodithionate, morpholinoethyldithiocarbamic acid, 1-piperidinylethyldithiocarbamic acid, sodium ethylenebis-dithiocarbamate, sodium octamethylene bis-dithiocarbamate, ammonium propylene bis-dithiocarbamate, sodium p-phenylene bis-dithiocarbamate and hexamethylene ammonium hexamethylene dithiocarbamate.
Claim 3
Dependent Claim
30 words
A photosensitive composition for diazo photography which comprises a photolytic aromatic diazonium salt, at least one member selected from the group consisting of dithiocarbamates of the formulas I and II,
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |