Now showing items 1-10 of 13
Polyalkylvinyl ether/polyalkyloxazoline copolymers, processes for making, and uses
(United States Patent and Trademark Office, 1991-01-29)
Graft and block copolymers of polyalkylvinyl ether and polyoxazoline moieties can be used as polymeric compatibilizers.
Formation of Reissert compound of bisbenzimidazole
(United States Patent and Trademark Office, 1991-06-04)
A Reissert compound of bisbenzimidazole can be formed by first reacting benzimidazole with an aliphatic diacid chloride to form bisbenzimidazole and then reacting the bisbenzimidazole with an aliphatic acid chloride and ...
Supported aqueous phase organometallic catalyst useful for hydroformylation and other reactions, and a method for its preparation
(United States Patent and Trademark Office, 1991-02-19)
This invention relates to a catalyst comprising a solid surface having immobilized thereon an aqueous solution of one or more organic complexes of rhodium. The catalyst is useful for promoting hydroformylation, hydrogenation ...
Method of producing star-like polymers from lignin
(United States Patent and Trademark Office, 1991-11-19)
A method of producing prepolymeric materials from lignin is disclosed. The method uses lignin which has been hydroxyalkyl modified, such that the lignin is substantially non-phenolic and solvent soluble and/or liquid. The ...
Ophthalmic contact lens with internal fixation light for examination of the optic nerve
(United States Patent and Trademark Office, 1991-06-18)
An instrument and method for examining the optic nerve head (34) of a patient's eye (14) is disclosed. The instrument is comprised of a gonioscopic lens (10) a lens system (26) where the lens system (26) directs a collimated ...
Poly(alkyl vinyl ether)polyolefin copolymers
(United States Patent and Trademark Office, 1991-03-05)
A blend of a polyolefin and a poly(alkyl vinyl ether) can be blended at elevated temperature to form a copolymer of the polyolefin and poly(alkyl vinyl ether). The resulting composition is useful as a compatibilizer, as a ...
Bis(functionally-substituted phenylene) semi-rigid crowns and process for making
(United States Patent and Trademark Office, 1991-07-02)
Bis(carboalkoxy-substituted phenylene)-32-crown-10 compounds, useful as polymerizable monomers, can be formed by first reacting a functionalized dihydroxy aromatic compound with a hydroxy protecting group-substituted ...
Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles
(United States Patent and Trademark Office, 1991-01-01)
A method and apparatus are disclosed for the microbubble flotation separation of very fine particles, especially coal, so as to produce a high purity and large recovery efficiently. This is accomplished through the use of ...
Water soluble derivatives of taxol
(United States Patent and Trademark Office, 1991-10-22)
Sulfonated 2'-acryloyltaxol and sulfonated 2'-O-acyl acid taxol derivatives are synthesized which have improved water solubility and stability while maintaining bio-activity. In particular, 2'-[(3-sulfo-1-oxopropyl)oxy]taxol ...
Preparation of acyclic bis (reissert compounds)
(United States Patent and Trademark Office, 1991-08-20)
A bis Reissert can be formed by the initial reaction of an aromatic dialdehyde (e.g., terephthaldicaboxaldehyde) and primary amine (e.g., methylamine) to form a reaction product which is then reacted with an acid chloride ...