Patents Represented by Attorney Bruce F. Jacobs

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  • Process for the manufacture of phthalocyanines
    Patent number: 4320059
    Abstract: Phthalocyanine compounds useful as pigments are prepared under a positive pressure of ammonia gas.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: March 16, 1982
    Assignee: American Cyanamid Company
    Inventor: Baldomero Casas
  • Polyquaternary flocculants
    Patent number: 4319020
    Abstract: Polyquaternary polymeric flocculants, containing a substantially reduced total residual amount of epihalohydrin and 1,3-dihalo-2-propanol and less than about 1000 ppm of dialkylamine, are produced by reacting a polyquaternary polymer prepared from epihalohydrin, dialkylamine, and optionally a polyfunctional amine with a compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl (C.sub.1 -C.sub.3), and R.sub.5 is hydrogen or hydroxyl.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: March 9, 1982
    Assignee: American Cyanamid Company
    Inventors: Anthony T. Coscia, Robert F. Tarvin, Dinshaw F. Bardoliwalla
  • Synthesis of hydroxy functional melamine derivatives
    Patent number: 4312988
    Abstract: The amount of isomelamine impurities formed in the reaction of melamine and an alkanolamine may be reduced by using isopropanolamine as the alkanolamine.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: January 26, 1982
    Assignee: American Cyanamid Company
    Inventors: William Jacobs, III, James C. Goebel
  • Synthesis of ortho-methyldiphenylmethane
    Patent number: 4304949
    Abstract: A process for the preparation of ortho-methyldiphenylmethane, a compound useful as an intermediate in the synthesis of anthraquinone, using liquid hydrogen fluoride to catalyze the alkylation of benzene with .alpha.-chloro-o-xylene at temperatures from about -10.degree. C. to 10.degree. C.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: December 8, 1981
    Assignee: American Cyanamid Company
    Inventors: Arnold Zweig, Robert G. Fischer
  • Flame retarded, rubber-modified, polyphenylene ether resin compositions
    Patent number: 4299760
    Abstract: Flame retardant polyphenylene ether resins are prepared using phosphine oxides of the formula: ##STR1## wherein Y is alkylene, substituted xylylene, bis(methylene)anthrylene, and bis(methylene)tetrahydronaphthalene.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: November 10, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Continuous process for manufacturing substantially fully methylated substantially fully methylolated melamine compositions
    Patent number: 4293692
    Abstract: The manufacture of a substantially fully methylated, substantially fully methylolated melamine composition is carried out by a continuous process in which the methylolation of melamine is conducted in two stages, the first stage being effected at an acidic pH and the second stage being effected at an alkaline pH. The reaction mixture is then concentrated and reacted with methanol after which all of the unreacted volatiles and precipitated salts are removed to provide the product composition.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: October 6, 1981
    Assignee: American Cyanamid Company
    Inventors: Venkatrao K. Pai, Joseph F. Skrivan
  • Isopropylidenedicyclohexylene esters and their use as light stabilizers
    Patent number: 4293467
    Abstract: Isopropylidenedicyclohexylene esters of 2,2,6,6-tetramethylpiperidine-4-carboxylic acid are disclosed as well as their use as light stabilizers for thermoplastic polymers such as polypropylene.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: October 6, 1981
    Assignee: American Cyanamid Company
    Inventors: William B. Hardy, Frank F. Loffelman
  • Bis phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin compositions
    Patent number: 4293465
    Abstract: Flame retardant, rubber-modified polyphenylene ether resin compositions are prepared using a phosphine oxide of the formula ##STR1## wherein R is cycloalkyl, phenyl, carbamoylethyl or carboalkoxyethyl; and Y is alkylene, substituted xylylene, and bis-(methyl)terephthalate.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: October 6, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin compositions
    Patent number: 4293464
    Abstract: Flame retardant compositions are prepared from rubber-modified polyphenylene ether resins and a phosphine oxide of the formula ##STR1## wherein R is alkyl, cycloalkyl, carboxyalkyl, phenyl, halophenyl, and alkoxyphenyl, and R' is hydrogen, alkyl, omega-cyanoalkyl, benzyl, alkylbenzyl and hydroxyalkyl.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: October 6, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Process for recovering 3-nitrobenzoic acid
    Patent number: 4288615
    Abstract: 3-Nitrobenzoic acid is recovered from a mixture of 2-, 3- and 4-nitrobenzoic acids by basifying to a pH of 8-12 and then adding an acid to reduce the pH to 1.5-3.5 to precipitate the desired compound.
    Type: Grant
    Filed: February 21, 1980
    Date of Patent: September 8, 1981
    Assignee: American Cyanamid Company
    Inventor: John H. Bright
  • Process for the production of 6-hydroxy-2-naphthoic acid
    Patent number: 4287357
    Abstract: The production of 6-hydroxy-2-naphthoic acid from anhydrous potassium 2-naphthoxide and carbon dioxide is improved by forming a mixture of 0.8-1.2 moles of 2-hydroxynaphthalene per equivalent of potassium base, dehydrating the mixture, adding carbon dioxide at about 20 to 90 psi at about 255.degree.-280.degree. C. and agitating and heating it at said pressure and temperature.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: September 1, 1981
    Assignee: American Cyanamid Company
    Inventors: Michael J. Mueller, Carroll S. Montgomery
  • Sulfoarylated nigrosine dye and use in jet-printing inks
    Patent number: 4284774
    Abstract: Nigrosine base is aryl sulfonated to produce a dye useful in jet-printing inks.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: August 18, 1981
    Assignee: American Cyanamid Company
    Inventor: Bennett G. Buell
  • Bis(sulfonamide) stabilizers for synthetic polymers
    Patent number: 4278577
    Abstract: Bis(sulfonamides) containing one or more hindered phenol groups are disclosed, as is their use as thermal stabilizers for polymers. Further stabilization results from combinations thereof with a thiodipropionate ester and a divalent metal salt of a carboxylic acid.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: July 14, 1981
    Assignee: American Cyanamid Company
    Inventor: John Song
  • Phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin compositions
    Patent number: 4278588
    Abstract: Polyphenylene ether resin compositions are flame retarded by using specified phosphine oxides of the formula(R).sub.3 P.dbd.Owherein R is alkyl, haloalkyl, phenyl, halophenyl, benzyl, alkylbenzyl, or cycloalkyl.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: July 14, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Flame retardant poly(butylene terephthalate) composition
    Patent number: 4278591
    Abstract: Flame retardant poly(butylene terephthalate) compositions are prepared by incorporating into the polymer a combination of a polymeric pentaerythrityl phosphonate and melamine pyrophosphate.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: July 14, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Epoxy based synthetic solder
    Patent number: 4273686
    Abstract: Epoxy based synthetic solders are prepared from (a) at least one epoxy resin, (b) at least one filler, (c) 1,1'-o-phenylenebis-(3,3-dimethylurea) wherein the phenyl moiety is optionally substituted with up to two alkyl (C.sub.1-3) groups and (d) dicyandiamide.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: June 16, 1981
    Assignee: American Cyanamid Company
    Inventors: James S. Noland, Miroslav Hajek
  • Water-based glyoxal cured coating compositions
    Patent number: 4272590
    Abstract: Storage-stable, room-temperature-curing, water-based coating compositions are prepared from emulsified copolymers containing amide functionality and using glyoxal as the cross-linking agent.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: June 9, 1981
    Assignee: American Cyanamid Company
    Inventor: Werner J. Blank
  • Cyclic diphosphonates
    Patent number: 4268459
    Abstract: Phosphonate compounds of the formula ##STR1## wherein R is hydrogen or methyl, R.sub.1 is hydrogen, methyl or ethyl, and y is an integer from 0 to 2, are useful as flame retardants for thermoplastic polymers, especially linear thermoplastic polyesters.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: May 19, 1981
    Assignee: American Cyanamid Company
    Inventor: Joseph A. Hoffman
  • Polymeric light stabilizers containing tetralkyl piperidine moieties
    Patent number: 4265805
    Abstract: Polymeric polyesters containing a 2,2,6,6-tetralkyl piperidine moiety in the repeating unit are disclosed as light stabilizers for polymers subject to degradation by ultra-violet light.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: May 5, 1981
    Assignee: American Cyanamid Company
    Inventor: Richard W. Thomas
  • Dust respirator
    Patent number: D259817
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: July 7, 1981
    Assignee: American Cyanamid Company
    Inventor: Willard C. White