Kyowa Hakko Kogyo Co., Ltd.

Tokyo Shibaura Electric Co., Ltd.

Tokyo Shibaura Denki Kabushiki Kaisha

Sony Corporation

Nissan Motor Company Limited

Canon Kabushiki Kaisha

Kurita Water Industries Ltd.

Minoru Watanabe

Kiyoshi Inoue

Kazuyuki Yamamoto

Kazuo Takahashi

Takashi Yamada

Hideyuki Okada

Kentaro Fujiyoshi

Masato Ofuji

Jun Kawanabe

Toshio Nishimura

Kenji Muto

Toru Sugaya

Tamotsu Hashimoto

Yoshinori Takemoto

Tadao Omi

Takao Hatta

Koji Yamada

Shigeru Sato

Kazuya Furumoto

Koichi Takahashi

Ryosuke Miura

Nobuhiro Nakamizo

Satoshi Takebayashi

Kai Suzuki

Tokuyuki Kuroda

Megumu Higuchi

Masao Asada

Masao Tezuka

Mitsuhiro Oikawa

Tomohiko Kobuya

Kenichi Shimizu

Shihoko Sekiguchi

Tsurahide Cho

Kotaro Koomoto

Kazuto Yokota

Ryoichi Kubo

Magnetic disc for computer

The compound of the formula ##STR1## is disclosed to have a less rapid decrease in blood pressure in its use as an antihypertensive.

1-benzyl-3,5-dimethyl-4-piperdyl ester of a Hantzsch dihydropyridine

A vasodilating or anti-hypertensive composition comprises a pharmaceutical carrier and an effective amount of a 1,4-dihydropyridine compound as an active ingredient. The 1,4-dihydropyridine compound may be represented by the following general formula: ##STR1## wherein R'.sub.1 and R'.sub.4 represent a hydrogen atom, R'.sub.2 and R'.sub.3 represent an alkyl group having 1-5 carbon atoms or a substituted heterocyclic group wherein a substituent is an N-benzylpiperidyl group, R'.sub.5 represents a nitro group, and R'.sub.6 and R'.sub.7 represent an alkyl group having 1-5 carbon atoms.

1-Substituted 1,4-dihydropyridines

Compounds having coronary and vasodilator effects, a hypotensive effect, and useful as antianginal drugs and drugs for treating hypertension are represented by the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different groups and each represents a lower alkyl group, one of R.sub.3 and R.sub.4 represents a lower alkyl group and the other represents a group of the general formula: ##STR2## wherein R.sub.5 represents an aralkyl group or an acyl group and n represents 0 or an integer of 1-3; the pharmaceutically acceptable acid addition salts thereof are also effective therapeutic compounds.

1,4-Dihydropyridine derivatives

An operating valve assembly for a power steering unit comprises inner and outer sleeves in sliding contact with each other and relatively rotatable in response to the twisting of a torsion bar corresponding to a steering load. The outer sleeve is formed in its inner circumferential surface with a plurality of recesses circumferentially spaced apart and having circular opening edges, which recesses are alternately connected to a pump and a drain chamber. The inner sleeve is formed in its outer circumferential surface with grooves establishing communication between adjacent ones of the aforesaid recesses. The outer sleeve is formed with apertures opening into the respective grooves, with the apertures being alternately connected to one or the other of the power cylinder chambers. The operating valve assembly is inexpensive and easy to manufacture.

Operating valve assembly for a power steering

Disclosed is a filter-coated phosphor with improved brightness and contrast property, having phosphor particles coated with filter particles of the same color as that of light emitted from a phosphor, the whole surface of each filter-coated phosphor particle or filter particle being coated with a continuous silica film.

Filter-coated phosphor

Disclosed is a method for surface treatment of phosphor particles which comprises forming a continuous film of silicon dioxide on the surface of each phosphor particle by treating the phosphor particle with a solution containing an aqueous solution of organic alkali and silicon dioxide dissolved therein.

Method for surface treatment of phosphor particles

A rare earth silicate phosphor co-activated by cerium and terbium which is expressed by the general structural formula:

Fluorescent lamp containing a green emitting rare earth silicate

Alkaline earth halide-rare earth fluoride phosphor

An X-ray conversion screen having reduced afterglow without any appreciable loss in the brightness under X-ray excitation comprises a substrate and at least one fluorescent layer applied thereto, the fluorescent layer containing a fluorescent substance which comprises terbium-activated lanthanum or gadolinium oxyhalide having yttrium or lutetium and, as desired, ytterbium added thereto as impurities.

X-ray conversion screens

Growing community of inventors

Tokyo, Japan

Minoru Watanabe