Patents by Inventor Erik T. Hansen

Erik T. Hansen 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).

  • Substituted quinolines and leucotriene antagonism treatment therewith
    Patent number: 5234932
    Abstract: The present invention relates to hitherto unknown compounds of formula, in which m and n stand for an integer from 0-5, p stands for 0 or 1, and q stands for an integer from 0-4, R.sub.1 and R.sub.2 are the same or different and stand for hydrogen, halogen, nitro, amino, alkyl or alkoxy; R.sub.3 is hydroxy, hydrogen, straight or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl; R.sub.5 stands for an acidic group, e.g. carboxy, 1-H tetrazolyl, a sulphonic acid group, a sulfamyl group, a sulphinic acid group, or a hydroxamic acid group; R.sub.4 and R.sub.6 are the same or different and stand for hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substituted C.sub.1 -C.sub.6 alkyl groups or unsubstituted or substituted aralkyl groups. R.sub.7 has the same meaning as R.sub.5 or represents a hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl group.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: August 10, 1993
    Assignee: Leo Pharmaceutical Products ltd.
    Inventors: Schneur Rachlin, Erik T. Hansen
  • Substituted quinolines and medicinal use thereof
    Patent number: 5110819
    Abstract: The present invention relates to hitherto unknown compounds of formula, in which formula R.sub.1 stands for hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substituted C.sub.1 --C.sub.8 --alkyl, aryl or for ar--C.sub.1 --C.sub.4 --alkyl, aryl or an being unsubstituted or substituted phenyl, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are the same or different and stand for hydrogen, halogen, pseudo halogen, cyano, nitro, amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; n and m are the same or different and stand for an integer from 0-6; provided that n cannot be zero when A stands for carboxy and X and Q both stand for a bond; X stands for a bond or for O, S, S(O), S(O).sub.2 or for NR.sub.8 where R.sub.8 is defined as R.sub.1 above; Q stands for a bond of for straight or branched, C.sub.1 --C.sub.6 --alkylene; A stands for an acidic group, e.g.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: May 5, 1992
    Assignee: Leo Pharmaceutical Products Ltd.
    Inventors: Ian Ahnfelt-Ronne, Erik T. Hansen, Dorte Kirstein, Ole Bent I. Nielsen, Schneur Rachlin
  • Improved method for preparing penicillanic acid derivatives
    Patent number: 4816580
    Abstract: The present invention relates to a new process for the debromination and/or deiodination of 6,6-dihalo- and 6-monohalopenicillanic acids or derivatives thereof by treatment with dialkyl, trialkyl or diaralkyl phosphite, the desired compounds being obtained in good to excellent yield and in a high state of purity.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: March 28, 1989
    Assignee: Leo Pharmaceutical Products Ltd. A/S
    Inventor: Erik T. Hansen