Thiol ester compositions, methods of making the thiol ester compositions, and methods of using the thiol ester compositions are provided. In some embodiments, the thiol ester compositions include thiol esters, hydroxy thiol esters and cross-linked thiol esters. The thiol ester composition can be used to produce cross-linked thiol esters, sulfonic acid-containing esters, sulfonate containing esters and thioacrylate containing esters. The thiol ester compositions can be used to produce polythioure...

A system for use in conjunction with a stereomapper for determining conjugate points on stereoscopically generated images along a plurality of parallel lines during each mechanical translation of the images across the area being mapped. The system operates in the digital domain and incorporates control logic, either hardware or software, for modifying the data to correct the geometrical distortions, for selecting the data to be correlated in accordance with the parallax data computed from the pr...

An automatic orthophoto printer and display for the preparation of orthophotographs from a pair of stereo aerial photographs is described which includes circuitry for compensating for position errors of the transports holding the photographs. Position sensors provide digital position signals representing the actual position of each transport in X and Y directions to digital comparators which subtractively combine the position signals with digital stage coordinate signals representing desired pos...

A catalyst used for preparing thiochloroformates by reacting thiols with phosgene is a cyclic urea or cyclic thiourea which may be in the form of a salt obtainable by reaction with a hydrohalic acid or phosgene.

The subject-matter of the invention is a process for the preparation of substituted 4-methylbiphenyls of general formula: ##STR1## in which R is a cyano group or a protected tetrazolyl group of formula: ##STR2## in which R.sub.1, situated at the 1 or 2 position of the tetrazolyl group, is a protective group, characterized in that a halobenzene of formula: ##STR3## in which Hal is a halogen atom and R has the same meaning as above, is reacted with a p-tolylmagnesium halide in the presence of a li...

Compounds of the formula: ##STR1## wherein n is 1, 2, 3, or 4; X.sup.1 and X.sup.2 are each, independently, chlorine or bromine; A is O or S; R.sup.1 is hydrogen or C.sub.1 -C.sub.16 alkyl; R.sup.2 is C.sub.1 -C.sub.16 alkyl, C.sub.6 -C.sub.16 aryl, C.sub.1 -C.sub.4 alkylidene, or CH.sub.2 OR.sup.5 ; R.sup.3 is hydrogen, chlorine, bromine, or OR.sup.6 ; R.sup.4 is C.sub.1 -C.sub.16 alkyl, C.sub.7 -C.sub.16 aralkyl, C.sub.2 -C.sub.16 alkenyl, or C.sub.6 -C.sub.18 aryl; R.sup.5 is hydrogen, C.sub....

The invention relates to a method of producing (meth)acryloylthio esters of general formula I ##STR1## where R represents hydrogen or methyl, and R.sup.1 represents a phenyl group, a substituted phenyl group, a C.sub.1-24 alkyl group, a substituted C.sub.1-24 alkyl group, a cyclic C.sub.3-24 alkyl group; comprising reacting (meth)acrylic acid anhydride (formula II) ##STR2## where R represents hydrogen or methyl, with at least the stoichiometric amount with a thiol or thiolate of formula III wher...

Thioesters of the formula RCOSR are produced from a mercaptan of the formula RSH wherein R is a benzylic, aromatic or aliphatic moiety by reacting the mercaptan with carbon monoxide in the presence of a polyunsaturated olefinic hydrocarbon and as catalyst a metal component selected from iron, cobalt, nickel, molybdenum, ruthenium, rhodium and iridium, the metal component being in free or combined form.

Signals having indications useful in defining the location of an object surface point in space are generated from a two-dimensional record encoded in accordance with an object surface irradiating succession to provide information additional to record-contained x, y positional coordinate data for the surface point. In a preferred practice, adjacent portions of an object are successively irradiated and a corresponding series of photographic records is made. For each object surface point of interes...

An instrument for scanning single photographs to generate and store image data along epipolar lines for subsequent processing and map making is disclosed. The instrument embodies an electronically controlled mechanical stage translating the photographic image relative to a stationary microdensitometer along epipolar lines and a storage unit for storing the image data generated by the microdensitometer. An alternate embodiment of the mechanical stage includes a rotary stage reducing the scanning ...