Patents by Inventor Albrecht H. Granzow

Albrecht H. Granzow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Non-pyrophoric nigrosine base
    Patent number: 4359577
    Abstract: Nigrosine base (Color Index 50,415:1) which is pyrophoric is made non-pyrophoric by sparging a solution thereof in aniline with air.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: November 16, 1982
    Assignee: American Cyanamid Company
    Inventors: Albrecht H. Granzow, Erwin Klingsberg
  • Phosphinic acid flame retardants for polyphenylene ether resins
    Patent number: 4321187
    Abstract: Flame retardant compositions are prepared from rubber-modified polyphenylene ether resins and a phosphinic acid of the formula ##STR1## wherein R is aryl, alkyl, cycloalkyl and beta-cyano-substituted alkyl, and R' is hydrogen or the same groups as R.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: March 23, 1982
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • 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
  • 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
  • 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
  • Flame retardant poly(butylene terephthalate) compositions comprising melamine pyrophosphate and a phosphonate
    Patent number: 4257931
    Abstract: Flame retardant poly(butyleneterephthalate) composiitions are prepared by incorporating into the polymer a combination of a pentaerythrityl phosphonate and melamine pyrophosphate.
    Type: Grant
    Filed: January 29, 1980
    Date of Patent: March 24, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Synergistic flame retardant compositions for polyphenylene ether resins
    Patent number: 4255324
    Abstract: Polyphenylene ether resin compositions are flame retarded by using a combination of a phosphine oxide and a phosphonate in a weight ratio of about 1:3 to 3:1.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: March 10, 1981
    Assignee: American Cyanamid Company
    Inventors: Albrecht H. Granzow, Christos Savides
  • Flame retardants containing two or more 2-cyanoethyl groups for polyphenylene ether resins
    Patent number: 4247447
    Abstract: Flame retardant compositions are prepared from rubber modified polyphenylene ether resins and phosphine oxide compounds containing at least two 2-cyanoethyl groups.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: January 27, 1981
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Flame-retardant, polyphenylene-ether resin compositions containing a 2,5,5-trisubstituted 1,3,2-dioxaphosphorinane-2-oxide
    Patent number: 4228063
    Abstract: Flame retardant rubber-modified polyphenylene-ether resins compositions having improved thermal stability are prepared by using a 2,5,5-trisubstituted 1,3,2-dioxaphosphorinane-2-oxide of the formula: ##STR1##
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: October 14, 1980
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow
  • Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate
    Patent number: 4162278
    Abstract: Polyphenylene ether resin/rubber-modified, high-impact polystyrene thermoplastic compositions as rendered flame retardant by use of specific pentaerythrityl phosphonate compounds.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: July 24, 1979
    Assignee: American Cyanamid Company
    Inventor: Albrecht H. Granzow