Patents by Inventor Zdravko Kopitar

Zdravko Kopitar 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).

  • Patent number: 5514654
    Abstract: N-acyldipeptides of formula I ##STR1## wherein R represents a rest of formula ##STR2## and R.sub.4, Y, m, n and Z have the meaning as defined in the description, R.sub.1 represents hydrogen, a 1-10 C. alkyl, an optionally substituted methyl or benzyl,R.sub.2 represents a --CO--A group,wherein A has the meanings as defined in the description,R.sub.3 represents a --(CH.sub.2).sub.p --CO--W group,wherein p and W have the meaning as defined in the description.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: May 7, 1996
    Inventors: Slavko Pecar, Marija Sollner, Uros Urleb, Danijel Kikelj, Gasper Marc, Ales Krbavcic, Vlado Kotnik, Branka Wraber-Herzog, Sasa Simcic, Alojz Ihan, Lidija Klamfer, Lucka Povsic, Zdravko Kopitar, Anton Stalc
  • Patent number: 5231216
    Abstract: There are described novel trans-2-acylaminocyclohexyloxyacyldipeptides of formula I ##STR1## wherein R.sub.1 represents --CO--R.sub.6, --SO.sub.2 --R.sub.7 or ##STR2## R.sub.6 is C.sub.1 -C.sub.18 alkyl or C.sub.1 -C.sub.18 alkoxy, R.sub.7 is C.sub.1 -C.sub.18 alkyl or an optionally substituted phenyl group,Y is .dbd.O, .dbd.S or .dbd.NH;R.sub.2 =R.sub.3 and represent --H or C.sub.1 -C.sub.12 alkyl,R.sub.4 represents --OR.sub.8 or --NHR.sub.9,R.sub.8 is --H, C.sub.1 -C.sub.8 alkyl or benzyl,R.sub.9 is --H, a straight or branched chain C.sub.1 -C.sub.18 alkyl group or benzyl group;R.sub.5 represents --OR.sub.9 or --NHR.sub.9,and novel (1R,2R)- and (1S,2S)-trans-2-acylaminocyclohexyloxyacetyldipeptides of the formulas Ia and Ib ##STR3## wherein R.sub.1 is --CO--R.sub.6, R.sub.6 is C.sub.1 -C.sub.18 alkyl,R.sub.2 is --H,R.sub.3 is --H or C.sub.1 -C.sub.12 alkyl,R.sub.4 is --OR.sub.8 or --NHR.sub.9,R.sub.8 is --H, C.sub.1 -C.sub.8 alkyl or benzyl,R.sub.9 is --H, C.sub.1 -C.sub.18 alkyl or benzyl,R.sub.5 is --OR.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: July 27, 1993
    Assignee: Univerza Edvarda Kardelja v Ljubljana
    Inventors: Slavko Pecar, Danijel Kikelj, Uros Urleb, Marija Sollner, Gasper Marc, Ales Krbavcic, Vlado Kotnik, Branka Wraber-Herzog, Sasa Simcie, Alojz Than, Lidija Klamfer, Lucka Povsic, Zdravko Kopitar, Anton Stalc
  • Patent number: 5079237
    Abstract: There is described a new inclusion complex of nicardipine or its hydrochloride with beta-cyclohdextrin, which is prepared by admixing nicardipine or its hydrochloride with beta-cyclodextrin in a molar ratio of the compounds 1:0.9-1.1 under stirring at a temperature from about room temperature to the boiling temperature of the reaction mixture in an aqueous or ethanolic medium, cooling the reaction mixture to 0.degree. to 5.degree. C. and isolating the desired complex.The inclusion complex of nicardipine or its hydrochloride posesses cerebrovascular-vasodilatory and coronary-vasodilatory properties, which are equally well expressed as those of nicardipine or its hydrochloride themselves, yet owing to the better solubility of the complex at a higher pH range, such as it exists e.g. in the intestinal tract, the manufacture of sustained release pharmaceutical forms is made possible, whereby a greater extent of dissolution of the active substance is provided also in the intestinal juice.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: January 7, 1992
    Assignee: Lek
    Inventors: Breda Husu, Jenny Milovac, Zdravko Kopitar, Branko Huc, Janko Zmitek, Peter Bukovec, Mirjan Zorz, Boris Rusjakovski, Polona Cvelbar, Zdenka Jerala-Strukelj, Bojan Kofler
  • Patent number: 5069910
    Abstract: There are described novel dispersible cimetidine tablets containing 30 to 90% by weight of one of the polymorphous modifications of cimetidine A, B or C, 5 to 55% by weight of one or more disintegrationg agents, 0.05 to 5.0% by weight of a surfactant, such as sodium lauryl sulphate together with other common adjuvants. The process for the manufacture of dispersible cimetidine tablets is effected on the basis of known methods by granulating the ingredients and by compressing the granulate to tablets. Dispersible tablets disintegrate when brought in contact with water at room temperature within less than 1 minute to yield a fine dispersion, which facilitates the oral application. Therefore such tablets are particularly suitable for certain groups of patients, especially for the aged and children. Dispersible tablets containing cimetidine excell by their improved rate of dissolution and good bioavailability.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: December 3, 1991
    Assignee: Lek
    Inventors: Mateja Kovacic, Jenny Milovac, Polona Cvelbar, Anton Stalc, Zvezdana Trost, Zdravko Kopitar, Bojan Kofler, Vida Nikolic, Marija Lampret, Marija Lippai
  • Patent number: 5047247
    Abstract: There are described novel dispersible tablets of dihydroergotoxine or of acid addition salts thereof, containing 0.1 to 4% by weight of dihydroergotoxine or its acid addition salts, 4 to 60% by weight of one or more disintegrating agents, 0.8 to 10% by weight of an organic acid and, optionally, 0.2 to 2% by weight of an antioxidizing agent together with other common adjuvants. The process for the manufacture of dispersible tablets of dihydroergotoxine and of acid addition salts thereof is carried out on the basis of known methods by granulating the ingredients and by compressing the granulate to tablets. Dispersible tablets disintegrate within less than 1 minute when brought in contact with water at room temperature to yield a fine dispersion, which facilitates the oral application. Therefore such tablets are particularly suitable for the aged. Dispersible tablets containing dihydroergotoxine or acid addition salts thereof excell by their improved rate of dissolution and good bioavailability.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: September 10, 1991
    Assignee: LEK
    Inventors: Jenny Milovac, Mateja Kovacic, Zdravko Kopitar, Janja Urbancic-Smerkolj, Andrej Lenardic, Mirjan Zorz, Bojan Kofler, Angela Vene-Mozina, Vida Nikolic, Marija Lampret, Breda Meden
  • Patent number: 4952565
    Abstract: A new inclusion complex of ibuproxam with beta-cyclodextrin is described, which is prepared by adding ibuproxam to a boiling aqueous solution of beta-cyclodextrin, stirring the reaction mixture at the boiling temperature, cooling to a temperature of 0.degree. C. to 5.degree. C. and isolating the title complex.The analgesic, antipyretic and antiinflammatory properties of the inclusion complex of ibuproxam with beta-cyclodextrin are equivalent to those of ibuproxam alone, but owing to its better water-solubility the complex can be more easily formulated into pharmaceutical forms.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: August 28, 1990
    Inventors: Janko Zmitek, Jenny Milovac, Zdravko Kopitar, Mirjan Zorz, Boris Rusjakovski