Abstract: A monocomponent electrostatographic developer is disclosed. The developer contains a negative charging toner wherein the toner particle surface contains particles of cerium dioxide and a mixture of two hydrophobic silicon dioxides having a particle size of 0.005 to 0.03 .mu.m.

Abstract: A two component electrophotographic developer and development method. The developer includes carrier particles and toner comprising: polymeric binder; a first agent selected from the group consisting of compounds having the general structure: ##STR1## wherein n is from about 7 to about 21; R.sup.1 and R.sup.2 are each independently H or alkyl having from 1 to about 3 carbons; T represents an unshared electron pair or a proton and a counterion; and R.sup.3 is substituted or unsubstituted alkyl, alkylamide, aryl, or heteroaryl; and a second agent comprising quaternary ammonium salt.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. C. and a weight average molecular weight of 20,000 to 100,000 and, as a charge-control agent, from about 0.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. C.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. C. and a weight average molecular weight of 20,000 to 100,000 and, as a charge-control agent, from about 0.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. and a weight average molecular weight of 20,000 to 100,000 and, as a charge-controlling additive, from about 0.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. C. and a weight average molecular weight of 20,000 to 100,000 and from about 0.1 to about 10 percent by weight based on the weight of the resin particles of a mixture of ortho-benzoic sulfimide as represented by the formula: ##STR1## and para-anisic acid as represented by the formula: ##STR2## in a weight ratio of 1:1 as a charge-controlling additive.

Abstract: Two-color images are created in a single pass by forming an electrostatic image having three levels of electrostatic potential, low, intermediate and high. Toner of a first color is applied to the image in the presence of an electric field urging the toner toward one of the levels of potential. A second toner is applied to the electrostatic image having a second color, but of the same polarity as the first toner, in the presence of a second electric field urging the second toner both toward the areas that have been toned by the first toner and toward one of the other levels of potential. If the first toner is of a dark color and is used for text and the second color is the light color used for highlighting, a quality two-color image can be made in a single pass using toners of the same polarity.

Abstract: N-hydroxyphthalimide as a charge-control agent for fusible, dry electrostatographic toners.

Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions which employ, as a charge-control agent, a compound selected from the group consisting of phthalimide, 4-aminophthalimide and 4-tert-butylphthalimide; as well as to methods of utilizing such compositions in electrostatographic imaging systems.

Abstract: Preformed, water-soluble, acrylamide based copolymers comprising a minor proportion of a comonomer, which comonomer contains a site for a crosslinking reaction with a selected crosslinking agent by a reaction that does not involve a free-radical vinyl addition mechanism, which copolymers have M.sub.w and M.sub.n values within selected ranges, can be conveniently and safely used to prepare electrophoresis gel media in situ.

Abstract: A polyacrylamide type gel medium for electrophoresis is conveniently and safely prepared prior to use by crosslinking a water-soluble copolymer of an acrylamide monomer and at least one comonomer copolymerizable therewith, which comonomer contains an active methylene group that will enter into a crosslinking reaction that does not involve a free radical vinyl addition mechanism.

Abstract: Method and device for treating angina pectoris and preventing tolerance to nitrate drugs which takes into account the frequent need to provide the patient with relief from or prevention of pre-waking or early morning angina.

Abstract: A polyacrylamide type gel medium for electrophoresis is conveniently and safely prepared prior to use from a kit which comprises (1) a water-soluble copolymer of an acrylamide monomer and at least one comonomer copolymerizable therewith, which comonomer contains functional groups that permit crosslinking of said copolymer by a covalent but non-free radical initiated mechanism; and (2) a selected crosslinking agent in a package that separates it from the copolymer. Optionally, additional materials that may be usefully incorporated in the gel may be included in the kit, for example, a selected electrophoresis buffer and a complexing agent, such as SDS.

Abstract: A separator assembly for use in batteries comprising a film bearing a thermal fuse in the form of a layer of wax coated fibers is disclosed.

Abstract: A cathode comprising a current collector coated with a dispersion of (CF.sub.x).sub.n wherein x is equal to or less than 1.2 and n is an indeterminately large number, a current carrier and a binder characterized in that the current collector is a conductive foil, the binder is sufficiently adhesive to adhere the coated dispersion to the conductive foil and the coated dispersion has a porosity greater than 43 percent. The cathodes are useful in electrochemical cells having light metal anodes.