Abstract: Disclosed is a positive resist composition which ensures, on use of an exposure light source of 220 nm or less, high sensitivity, good resolution, sufficiently high resistance against dry etching, satisfactory adhesion to the substrate, and superior developability even with a developer conventionally used for resists (for example, a 2.38% aqueous tetramethylammonium hydroxide solution), the positive resist composition comprising a compound generating an acid on irradiation of an active light ray or radiation, a resin having a polycyclic-type alicyclic group and a carboxyl group, and a compound having at least two groups having a specific structure.

Abstract: A photopolymerizable composition comprising an addition-polymerizable compound having at least one ethylenic unsaturated double bond, a specific sensitizing dye represented by the following formula (I), and a titanocene compound: ##STR1## The substituents in formula (I) are defined in the specification.

Abstract: A positive-working light-sensitive composition comprises a diazonium salt represented by the following general formula (I) and an alkali-soluble polymer: ##STR1## wherein R.sup.1 represents a substituted or unsubstituted alkyl group having 3 to 18 carbon atoms; R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted phenoxy group or a halogen atom; A represents an organic group; X.sup.-- represents a counterion or an anion; n is an integer ranging from 1 to 4 and m is an integer ranging from 1 to 3, provided that the sum of n and m is equal to 4. The positive-working light-sensitive composition has high sensitivity and can ensure the formation of clear images.

Abstract: A positive-working light-sensitive composition whose solubility in a developer is increased by irradiation of light, which comprises:(a) a vinyl ether compound having at least one group represented by the following formula (A); ##STR1## wherein R.sup.3 represents a linear or branched alkylene group having 1 to 10 carbon atoms and n represents an integer of 0 or 1;(b) a compound capable of being decomposed by irradiation of an actinic light ray or a radiant ray and releasing an acid; and(c) an alkali-soluble polymer, the light-sensitive composition having high sensitivity to light and permitting the use of light of a wide wavelength range.

Abstract: A fuel supply system for a gaseous fuel operated vehicle engine in which a compressed gas from a bomb is decompressed by regulator means and then mixed with air to supply air-fuel mixture to the engine. The regulator means is divided into at least two units, locating an upstream regulator and the bomb in a luggage room section of a vehicle, and locating a downstream regulator and a mixer in an engine room section of the vehicle. A low pressure piping system is extended across a passenger's room section of the vehicle for interconnecting the upstream and downstream regulators. Particular structures of the regulator are also disclosed for effectively preventing freezing of fuel gas components which would lead to constriction of a high pressure gas passage formed in the regulator.

Abstract: A photoconductive composition and an electrophotographic light-sensitive material using the photoconductive composition are described. The photoconductive composition comprises a photoconductive substance and a water-insoluble linear polyester copolymer wherein the polyester copolymer contains a constituent repeating unit derived from terephthalic acid and a straight .alpha.,.omega.-diol component, and the diol component contains at least three compounds selected from the group of ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol. The electrophotographic light-sensitive material comprises a support and a layer of the above photoconductive composition on the support.

Abstract: A photoconductive composition is disclosed which contains an organic photoconductor and a vinylidene chloride-acrylonitrile copolymer. Furthermore, there is disclosed an electrophotographic photoreceptive material using such a photoconductive composition as its photoreceptive layer. The material has improved flexibility while maintaining desirable electrophotographic characteristics.