Now showing items 1-10 of 13
Formation of poly(benzimidazole)
(United States Patent and Trademark Office, 1991-11-19)
A poly Ressert can be formed by first reacting benzimidazole with an aliphatic diacid chloride to form bisbenzimidazole and then reacting the bisbenzimidazole with an aliphatic diacid chloride and cyanide to form the poly ...
Formation of reissert compound of benzoyl benzimidazole
(United States Patent and Trademark Office, 1991-03-19)
The Reissert compound of 1-benzoylbenzimidazole can be formed by reaction of an acid chloride (e.g., benzoyl chloride) and cyanide (e.g., trimethylsilyl cyanide) with benzoyl benzimidazole. It has the formula: ##STR1## and ...
Formation of acyclic bis (reissert compounds)
(United States Patent and Trademark Office, 1991-02-26)
Bis Reissert compounds can be formed by reaction of a cyanohydrin, formed by reaction of an aldehyde and a diamine, with benzoyl chloride in the presence of an amine acid acceptor.
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 ...
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 ...
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 ...
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.
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 ...