Kanzaki Paper Manufacturing Co., Ltd.

Nippondenso Co., Ltd.

Hiroshi Iwasaki

Mitsuru Kondo

Shinsuke Irii

Makoto Miyake

Kiyoshi Yasui

Haruo Omura

Tetsuo Shiraishi

Nobuo Kanda

Tetsuo Fujii

Toshio Sakakibara

Takeshi Murakami

Nobuyoshi Sakakibara

Shunsuke Shioi

Masayuki Omatsu

Yoshitaka Okumura

Hiromasa Kondo

Shigeo Okamoto

Soichi Saji

Mitsura Kondo

Jujiro Kouno

An image-receiving sheet for thermal transfer printing comprising a substrate and an image-receiving layer disposed on said substrate, characterized in that said image-receiving layer contains thermoplastic resin fine particle aggregates. And an image-receiving sheet comprising a substrate, an intermediate layer disposed on said substrate, and an image-receiving layer disposed on said intermediate layer, characterized in that at least said intermediate layer contains thermoplastic resin fine particle aggregates.

Image-receiving sheet for thermal transfer printing with a layer

A non-volatile semiconductor memory device comprises a semiconductor substrate of a first conduction type, an impurity buried layer of a second conduction type formed at the surface of the semiconductor substrate for constituting either one of a drain region or a source region, an epitaxial layer of a second conduction type formed at the surface of said impurity buried layer, an insulatiang partition wall extended vertically from the surface of the epitaxial layer surrounding operation regions in the impurity buried layer for defining the operation regions therein, at least one electron holding portion extended vertically with a predetermined distance from the operation regions and disposed within the insulating partition wall apart from the operation region, the impurity buried layer or the drain region by an insulation film of such a thickness as causing a tunnel effect, control gates disposed within the insulation partition wall disposed on every electron holding portions on the side opposite to the operation regions and extended vertically with a certain gap from the electron maintaining portions, and a control gate disposed within the insulating partition wall on every electron holding portions on the opposite side to the operation region extended vertically and with a certain gap to the electron holding portions, and an impurity region of a second conduction type formed at the surface of the operation region for constituting the other of the drain region or the source region.

Non-volatile semiconductor memory device

A new fluoran derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, X and Y have the same meaning as defined hereinbefore.

Fluoran derivatives as new compounds and recording system utilizing the

A new fluoran derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1, R.sub.2, X, Y and Z have the same meaning as defined hereinbefore.

Fluoran derivatives as new compounds, process for preparing the same and

A process is described for preparing triarylmethane derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives and aniline derivatives or indole derivatives with Friedel-Crafts type catalyst or Friedel-Crafts type catalyst and an oxidizing agent.

Triarylmethane derivatives

Process for preparing triarylmethane derivatives

The method of making microcapsules comprises performing polycondensation for producing aminoaldehyde resin in an aqueous dispersion including particles of hydrophobic core material in the presence of cation-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said particles of hydrophobic core material.

Method of making microcapsules

The method of making microcapsules comprises performing polycondensation of an aminoaldehyde resin prepolymer in an aqueous dispersion including particles of hydrophobic core material in the presence of anion-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said particles of hydrophobic core material.

Microcapsules, method for their production and pressure sensitive

A hydrophobic organic solvent containing a compound of the formula ##STR1## is dispersed and emulsified in an aqueous medium containing a sulfinic acid of the formula

Preparation of aqueous medium suitable for preparing microcapsules

In the method of making microcapsules polycondensation for forming an anion-modified aminoaldehyde resin is performed in the presence of at least one anionic colloid material in an aqueous dispersion including hydrophobic material particles dispersed therein to deposit said anion-modified aminoaldehyde resin on said hydrophobic material particles to form microcapsules encapsulating hydrophobic capsule core material therein.

A process is described for preparing benzophenone derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives with the use of at least one oxidizing agent.

Process for preparing benzophenone derivatives

The present invention relates to a process for removing an aldehyde from dispersions containing the aldehyde by introducing a gas into the dispersion.

Process for removing aldehyde from dispersions of microcapsules

The method of making impermeable microcapsules comprises the steps of preparing an aqueous dispersion of microcapsules having a capsule wall of a water-insoluble polyamine-epoxy resin and adding to the aqueous dispersion an electrolyte to dehydrate the microcapsules.

Method of making impermeable microcapsules

The black color developing heat-sensitive recording material comprises a base sheet and a color developing layer formed on at least one surface of the base sheet, the color developing layer including colorless or light-colored chromogenic material and acceptor which is reactive with said chromogenic material to develop a black color. At least 60% by weight of the chromogenic material comprises at least two kinds of black color developing fluoran compounds having the eneral formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, X.sub.l and Ym are described hereinafter and the amount of each of said black color developing fluoran compounds is not larger than 90% by weight of the total amount of said black color developing fluoran compounds.

Growing community of inventors

Kawanishi, Japan

Hiroshi Iwasaki