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Patent Agency Ranking
公开(公告)号：DE1572033B1
公开(公告)日：1973-02-15
申请号：DE1572033
申请日：1967-05-23
Applicant: IBM
Inventor： WILLIAM GROBIN JUN ALLEN
Abstract: 1,149,598. Lippman images. INTERNATIONAL BUSINESS MACHINES CORP. April 18, 1967 [Aug.29, 1966], No.17643/67. Heading G2C. Lippman silver images are rendered more light transmittant and light stable by treating them with an aqueous medium containing mercury iodide and potassiumiodide.
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公开(公告)号：DE1598608A1
公开(公告)日：1970-04-16
申请号：DE1598608
申请日：1965-10-25
Applicant: IBM
Inventor： WILLIAM GROBIN JUN ALLEN
Abstract: Phosphites may be determined in solution in the presence of hypophosphites by mixing with an acidic solution containing a non-oxidising, non-reducing acid and an oxi-anion with a central metal atom capable of forming a heteropoly acid with phosphites, adding a reducing agent which reacts more readily with hypophosphite than with phosphite, whereby a coloured solution is formed, and measuring the colour intensity. Sufficient acid to prevent hypophosphite interference should be present. Specified anions are tungstate, chromate, vanadate and, as exemplified, molybdate. Specified reducing agents are ascorbic acid, isoascrobic acid, hydroquinone and p-methylaminophonol sulphate. The acid solution is generally above 4N, and sulphuric acid is specified.
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公开(公告)号：DE1521338A1
公开(公告)日：1969-07-31
申请号：DE1521338
申请日：1966-10-14
Applicant: IBM
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