Patents by Inventor Laszlo Pallos

Laszlo Pallos 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: 4994448
    Abstract: The new compounds of the general Formula I ##STR1## (wherein R.sub.1 stands for C.sub.1-4 alkyl or aralkyl; andR.sub.2 represents hydroxy; orR.sub.1 and R.sub.2 together form a valency bond;R.sub.3 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenyl, amino, alkylthio or a group of the Formula --NR.sub.7 R.sub.8 in which R.sub.7 and R.sub.8 may be the same or different and stand for hydrogen, C.sub.1-4 alkyl, phenyl-C.sub.1-4 alkyl, hydroxy-C.sub.1-4 alkyl or di-(C.sub.1-4 alkyl)-amino-C.sub.1-4 alkyl or together with the nitrogen atom they are attached to form a 6-membered heterocyclic ring which may optionally contain a further nitrogen, oxygen or sulfur atom; orR.sub.2 and R.sub.3 together form an oxo (.dbd.O) or thixo (.dbd.S) group;R.sub.4 represents hydrogen, C.sub.1-4 alkyl or phenyl which may optionally bear one or two halogen or nitro substituent(s);Z is a group of the Formula (a) or (b) ##STR2## A.sup.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: February 19, 1991
    Assignee: Egis Gyogyszergyar
    Inventors: Andras Messmer, Gyorgy Hajos, Zsuzsa Juhasz nee Riedl, Pal Benko, Laszlo Pallos, Lujza Petocz, Eniko Szirt nee Kiszelly, Gabor Gigler, Istvan Gyertyan, Maria Hegedus
  • Patent number: 4871846
    Abstract: A process for the preparation of condensed as-triazinium derivatives of the formula I ##STR1## and isomers thereof, wherein R.sub.1 inter alia is an alkyl group, R.sub.2 inter alia is hydrogen or an alkyl group and R.sub.3 is hydrogen and where Z is a group of the formula a or b ##STR2## which comprises reacting a compound of the formula II ##STR3## where Y is a group of the formula c or d ##STR4## with a compound of the formula IIaNH.sub.2 --CO--R.sub.2 (IIa)in the presence of a dehydrating agent. The advantage of the process is that it consists of fewer reaction steps and provides higher yields than the known methods. The compounds of formula I are pharmaceutically active known derivatives.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: October 3, 1989
    Assignee: EGIS Gyogyszergyar
    Inventors: Sandor Batori, Gyorgy Hajos, Andras Messmer, Pal Benko, Laszlo Pallos, Lujza Petocz, Katalin Grasser, Ibolya Kosoczky, Eniko Szirt nee Kiszelly
  • Patent number: 4814174
    Abstract: The invention relates to a transdermal laminated pharmaceutical composition (plaster) having prolonged effect, wherein one or more storing layer(s) comprising the active ingredient, an ethylene/vinyl acetate copolymer regulating layer and an adhesive layer are applied onto the carrier.The pharmaceutical composition is prepared by coupling a carrier comprising the active ingredient with a regulating layer consisting of an ethylene/vinyl acetate copolymer foil having a vinal acetate content of 2-40 molar %. The foil is previously irradiated in a thickness of 100-300 .mu.m with a high-energy irradiation in a dose of 1-15 Mrad--preferably with electrone radiation--and thereafter stretched at 80.degree.-90.degree. C. to a thickness of 2-200 .mu.m.The system comprising the carrier and the regulating layer is subsequently coupled with an adhesive layer.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: March 21, 1989
    Assignees: Egis Gyogyszergyar, Muanyagipari Kutato Intezet
    Inventors: Iren Barta, Pal Fekete, Laszlo Pallos, Gabor Kovacs, Lajos Mahr
  • Patent number: 4753938
    Abstract: The invention relates to new compounds of the general Formula I ##STR1## and isomers thereof wherein R.sub.1 is C.sub.1-10 alkyl, C.sub.3-6 cycloalkyl or phenyl, naphthyl or phenyl-(C.sub.1-4 alkyl), wherein the aryl ring of the three latter groups may optionally bear one or more halogen, nitro, trifluoromethyl, amino, hydroxy, C.sub.1-4 alkyl and/or C.sub.1-4 alkoxy substituent(s);R.sub.2 stands for hydrogen, halogen, hydroxy, oxo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenyl or naphthyl, wherein the two latter groups may optionally bear one or more halogen, nitro, trifluoromethyl, amino, hydroxy, C.sub.1-4 alkyl and/or C.sub.1-4 alkoxy substituent(s);R.sub.3 represents hydrogen, hydroxy or C.sub.1-4 alkoxy;Z is buta-1,3-dienyl or a group of the general Formula (a) ##STR2## or (b) ##STR3## and X is hydrogen or halogen.The compounds of the general Formula I possess useful pharmacological properties, particularly antidepressant and antiarrhythmial effect.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: June 28, 1988
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Andras Messmer, Sandor Batori, Gyorgy Hajos, Pal Benko, Laszlo Pallos, Lujza Petocz, Katalin Grasser, Eniko Szirt nee Kiszelly
  • Patent number: 4746678
    Abstract: The invention relates to new phenanthrene derivatives wherein R stand for C.sub.1-10 alkylamino; C.sub.1-10 alkylthio; C.sub.1-5 alkoxy; or phenyl or phenylamino, the two latter groups being optionally substituted on the phenyl ring by one or more identical or different C.sub.1-4 alkyl, C.sub.1-4 alkoxy, nitro, amino, cyano and/or halogen substituent(s) .The compounds of the present invention possess valuable fungicidal properties and may be used in agriculture, horticulture and therapy as active ingredient of fungicidal or antifungal compositions.The compounds of the general Formula I ##STR1## may be prepared by acylating 9,10-phenanthrene-dione-9-oxime or an alkali or alkali earth metal salt thereof.
    Type: Grant
    Filed: June 4, 1986
    Date of Patent: May 24, 1988
    Assignee: EGIS Gyoryszergyar
    Inventors: Pal Benko, Tibor Zsolnai, Marta Kininczky, Laszlo Pallos, Iren Zsolnai nee Csillag, Peter Tetenyi, Jeno Bernath
  • Patent number: 4697013
    Abstract: A one step process for the preparation of compounds having antidepressant activity of the formula I ##STR1## and isomers thereof, wherein R.sub.1, R.sub.2, Z and A.sup.- have the meanings indicated in the claims, which process comprises: heating a compound of the formula II ##STR2## wherein Z, A.sup.-, R.sub.1 and R.sub.2 have the meanings set out in the claims and R.sub.3 stands for hydrogen or C.sub.1-4 alkyl, in the presence of a dehydrating agent to split off a compound of the formula R.sub.3 OH. The invention is also directed to compounds of the formula I, wherein R.sub.2 is halogen and to compositions containing a compound of the formula I which exhibit antidepressant activity.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: September 29, 1987
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Andras Messmer, Sandor Batori, Gyorgy Hajos, Pal Benko, Laszlo Pallos, Lujza Petocz, Grasser Katalin, Ibolya Kosoczky
  • Patent number: 4652562
    Abstract: The invention relates to new quinoline derivatives of the general Formula I ##STR1## (wherein X stands for hydrogen, halogen or lower alkoxy;n is an integer of 1, 2 or 3;R.sup.1 represents hydrogen andR.sup.2 represents hydroxy-lower alkyl or lower alkoxy-lower alkyl or a group of the general formula IV, ##STR2## wherein Z stands for --O--, --S--, --NH-- or --N(lower alkyl)--; the dotted lines represent optional bonds; andm is 0 or 1; orR.sup.1 and R.sup.2 together with the adjacent nitrogen atom, they are attached to, form a 5- or 6-membered heterocyclic group which may optionally contain a further oxygen, nitrogen or sulfur heteroatom and may be optionally substituted),and pharmaceutically acceptable acid addition salts thereof. The new compounds of the present invention exhibit radiosensitizing effect, make hypoxial cells highly sensitive towards radiation and may be used in radiation therapy.
    Type: Grant
    Filed: June 4, 1986
    Date of Patent: March 24, 1987
    Assignee: Egis Gyogyszergyar
    Inventors: Edit Berenyi nee Poldermann, Laszlo Varga, Laszlo Pallos, Lujza Petocz, Laszlo Ladanyi, Peter Tompe, Eva Hartai nee Zsorzs, Agnes Kovacs nee Palotai
  • Patent number: 4511717
    Abstract: The invention relates to new 2-hydroxymethyl-quinoxaline-1,4-dioxide derivatives of the general formula (I) ##STR1## wherein A represents an amino group, or a group of the general formula --NH--COOR.sub.1, wherein R.sub.1 stands for a C.sub.2-4 alkyl group, or a group of the general formula --NH--CX--NH.sub.2, whereinX denotes an oxygen or sulfur atom, or a group of the formula --NH--C(NH)--NH.sub.2, or a group of the general formula --NH--R.sub.2, wherein R.sub.2 represents a C.sub.1-6 alkyl, a phenyl, a benzyl, a hydroxyl or a hydroxy-(C.sub.2-4 alkyl) group, or a group of the general formula --NH--CO--R.sub.3, wherein R.sub.3 stands for a C.sub.1-20 alkyl group or a phenyl group optionally substituted by one, two or three identical or different substituent(s) selected from the group consisting of nitro, hydroxyl, amino, C.sub.1-3 alkoxy and halogen; a naphtyl group optionally substituted by a hydroxyl group, a phenyl-(C.sub.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: April 16, 1985
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Ildiko Ratz nee Simonek, Laszlo Pallos, Karoly Magyar, Jeno Kovacs, Erzsebet Matrai, Janos Gundel, Albert Balogh
  • Patent number: 4419355
    Abstract: The invention relates to new condensed as-triazine derivatives of the general formula (I) ##STR1## wherein Z represents a buta-1,3-dienyl group or a group of the formula (a), (b), (c) or (d) ##STR2## R.sub.1 denotes a C.sub.1-10 alkyl group, an oxo group or a C.sub.6-10 aryl or C.sub.6-10 aryl-(C.sub.1-3 alkyl) group optionally substituted by one or more identical or different substituents selected from the group consisting of amino, nitro, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, hydroxy and halogen,R.sub.2 stands for hydrogen, C.sub.1-10 alkyl or amino,R.sub.3 represents hydrogen, C.sub.1-10 alkyl or C.sub.6-10 aryl or C.sub.6-10 aryl-(C.sub.1-3 alkyl) optionally substituted by one or more identical or different substituents selected from the group consisting of nitro, amino, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, hydroxy and halogen,X.sup.- denotes an anion, andn is 0 or 1,with the proviso that if n is O, R.sub.1 is other than an oxo group and R.sub.1 ' and R.sub.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: December 6, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Ibolya Kosoczky, Eva Toncsev, nee Ravasz, Pal Benko, Laszlo Pallos, Lujza Petocz, Sandor Batori, Gyorgy Hajos, Andras Messmer, Katalin Grasser
  • Patent number: 4324894
    Abstract: Novel aminoisoquinoline derivatives of the general formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom or a C.sub.1-4 alkyl group,R.sub.2 represents a hydrogen atom,R.sub.3 represents a hydrogen atom,R.sub.4 represents a morpholinyl group or a piperazinyl group substituted with a pyridyl group, andpharmaceutically acceptable acid addition salts and quaternary derivatives thereof have been prepared. The novel compounds exert narcosis potentiating effects.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: April 13, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Andras Gelleri, Gyorgy Hajos, Andras Messmer, Laszlo Pallos, Lujza Petocz, Ibolya Kosoczky, Katalin Grasser, Peter Gorog, Eniko Szirt nee Kiszelly
  • Patent number: 4097668
    Abstract: The invention provides 2-?(p-methoxy-benzoyl)-hydrazono-formyl!-quinoxaline-1,4-dioxide.This compound is indicated for use as a potent antibacterial agent having a low toxicity.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: June 27, 1978
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Ildiko Simonek, Laszlo Pallos, Jeno Kovacs, Karoly Magyar
  • Patent number: 4091206
    Abstract: The invention relates to new quinoxaline-1,4-dione derivatives of the formula ##STR1## wherein R is pyridyl, 5-nitrofuryl or 1-naphthylmethyl group. The new compounds of formula I have weight-gain increasing effects.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: May 23, 1978
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Ildiko Simonek, Laszlo Pallos, Jeno Kovacs, Karoly Magyar