Information
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Patent Grant
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T105001
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Patent Number
T105,001
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Date Filed
Monday, February 27, 198440 years ago
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Date Issued
Tuesday, January 1, 198539 years ago
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US Classifications
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International Classifications
- G03C554
- G03C1485
- C07D23354
- C07D21538
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Abstract
The use of thioamido and alkynyl substituted heterocyclic ammonium salts in producing images in silver halide photographic elements is disclosed. The thioamido and alkynyl substituted heterocyclic ammonium salts can be incorporated in photographic silver halide emulsions. The thioamido substituent is capable of promoting adsorption of these salts to silver halide grain surfaces. In negative working surface latent image forming emulsions the thioamido and alkynyl substituted heterocyclic ammonium salts permit higher speeds to be achieved. In direct positive internal latent image forming emulsions nucleation activity and improved incubation stability can be achieved.
Divisions (1)
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Number |
Date |
Country |
Parent |
503470 |
Jun 1983 |
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