1
Keiso Saeki, Hiroharu Matsukawa: Process for hardening microcapsules containing hydrophobic oil droplets. Fuji Photo Film, Sughrue Rothwell Mion Zinn & Macpeak, May 11, 1976: US03956172 (82 worldwide citation)

In a process for hardening microcapsules produced by microencapsulating hydrophobic oil droplets using a complex coacervation process with gelatin as one of the hydrophilic colloids: including the steps of


2
Keiso Saeki, Hiroharu Matsukawa, Masato Satomura: Method for preparing microcapsules. Fuji Photo Film, Sughrue Rothwell Mion Zinn and Macpeak, February 17, 1981: US04251386 (72 worldwide citation)

A method for preparing microcapsules comprising polymerizing urea and formaldehyde in the presence of an anionic polyelectrolyte and an ammonium salt of an acid and forming a wall membrane of a urea/formaldehyde resin around droplets of a hydrophobic oily liquid.


3
Akio Miyamoto, Hiroharu Matsukawa, Teruo Kobayashi: Method for desensitization of a color developer. Fuji Photo Film, Sughrue Rothwell Mion Zinn and Macpeak, February 14, 1978: US04073968 (67 worldwide citation)

A method of desensitization of a color developer to form a color upon reaction with a color former which comprises coating a photocurable composition containing a photocurable compound on a color developer sheet and then irradiating the coated surface with light to cure the photocurable compound and ...


4
Fujio Kakimi, Nobuo Hiratsuka, Hiroharu Matsukawa: Novel material for immunological assay of biochemical components and a process for the determination of said components. Fuji Photo Film, Sughrue Mion Zinn Macpeak & Seas, August 3, 1982: US04342739 (63 worldwide citation)

Antigen- or antibody-bound microcapsules are employed for immunological assay of biochemical components having immunological activity. The microcapsule system provides high detection sensitivity, high accuracy and excellent reproducibility in immunological assay, without causing non-specific reactio ...


5
Hiroharu Matsukawa, Takao Hayashi: Coated pressure sensitive copying paper. Fuji Photo Film, Sughrue Rothwell Mion Zinn & Macpeak, April 20, 1976: US03952129 (42 worldwide citation)

A color-forming composition and recording sheets embodying the composition are disclosed, wherein the color-forming composition comprises: (a) a leuco dye, (b) an aromatic secondary amine or derivative thereof and (c) an organic solvent.


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Keiso Saeki, Hiroharu Matsukawa, Masato Satomura: Method for preparing microcapsules. Fuji Photo Film, Sughrue Mion Zinn Macpeak & Seas, October 26, 1982: US04356109 (28 worldwide citation)

A method for preparing microcapsules comprising polymerizing urea and formaldehyde in the presence of an anionic polyelectrolyte and an ammonium salt of an acid and forming a wall membrane of a urea/formaldehyde resin around droplets of a hydrophobic oily liquid.


8
Akio Miyamoto, Hiroharu Matsukawa: Desensitizing composition. Fuji Photo Film, Sughrue Rothwell Mion Zinn and Macpeak, July 18, 1978: US04101690 (26 worldwide citation)

A desensitizing composition for a color developer capable of coloring a substantially colorless color former, which desensitizing composition contains a compound represented by the following general formula (I) ##STR1## wherein R has from 2 to 20 carbon atoms and represents an alkyl group, an alkeny ...


9
Yoshiyuki Hoshi, Hiroharu Matsukawa: Process for the production of microcapsules. Fuji Photo Film, Sughrue Mion Zinn Macpeak & Seas, October 12, 1982: US04353809 (26 worldwide citation)

Microcapsules with a melamine-formaldehyde or urea-formaldehyde resin capsule shell are produced by adding in advance a polyvalent isocyanate, a polyvalent isothiocyanate or a prepolymer thereof to the hydrophobic oily liquid to be encapsulated, emulsifying the hydrophobic oily liquid in an aqueous ...


10
Yutaka Akiyoshi, Shinzo Kobayashi, Fujio Kakimi, Hiroharu Matsukawa: Process for preparing microcapsule reagents for immunological response. Fuji Photo Film, Sughrue Mion Zinn Macpeak & Seas, May 20, 1986: US04590170 (24 worldwide citation)

A process for producing a microcapsule diagnostic material utilizing passive agglutination which comprises binding an antigen or antibody onto a microcapsule wall negatively charged, in an acidic solution is provided. The microcapsule diagnostic material thus produced has an extremely high sensitivi ...