Patents by Inventor Istvan Racz

Istvan Racz 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: 6458774
    Abstract: Complexes of deprotonated hyaluronic acid with 3d metal ions of the 4th period of the Periodic Table and compositions containing these complexes as active ingredients or carriers. A process for the preparation of the complexes and compositions (pharmaceutical and cosmetic compositions) containing these complexes as active ingredients are disclosed in which zinc or cobalt (II) hyaluronate is preferably used as active ingredient.
    Type: Grant
    Filed: November 25, 1994
    Date of Patent: October 1, 2002
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Kalman Burger, Ivan Rethey, Bela Stefko, Istvan Gebhardt, Arpadne Kiraly, Geza Takacsi Nagy, Janos Illes, Erzsebet Neszmelyi, Istvan Racz, Victoria Varkonyi
  • Patent number: 5484776
    Abstract: This invention relates to a process for the production of optimally stable orally administrable solution forms of medicaments containing high-molecular polysaccharides, with controlled release of drugs having beta-blocking action, this process consisting of the reacting of 1 to 20 parts (w/w) of beta-blocking agent (oxprenolol, pindolol, sotalol, metoprolol, alprenolol, acebutolol, atenolol, bopindolol, practolol, nadolol or propranolol) in 100 parts of an aqueous solution with 0.001 to 10.0 parts of a polysaccharide polymer, advantageously with Xanthan Gum having beta-1,4-glucan chain, or dextran, or amylodextrin, or carboxymethylamylum. The reaction is allowed to take place in the course of 20 minutes at a pH adjusted no 2.0-4.5, with vigorous stirring at 80.degree. C. temperature. Following the usual method of the pharmaceutical practice, the system is then formulated by the addition of water to obtain a solution suitable for oral administration.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: January 16, 1996
    Assignee: Synepos Aktiengesellschaft
    Inventors: Istvan Racz, Sylvia Marton
  • Patent number: 5472950
    Abstract: Complexes of deprotonated hyaluronic acid with 3d metal ions of the 4th period of the Periodic Table and compositions containing these complexes as active ingredients or carriers. A process for the preparation of the complexes and compositions (pharmaceutical and cosmetic compositions) containing these complexes as active ingredients are disclosed in which zinc or cobalt (II) hyaluronate is preferably used as active ingredient.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: December 5, 1995
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Kalman Burger, Ivan Rethey, deceased, Bela Stefko, Istvan Gebhardt, Arpadne Kiraly nee Gyongyver Soos, Geza T. Nagy, Janos Illes, Erzsebet Nesmelyi, Istvan Racz, Viktoria Varkonyi
  • Patent number: 5087447
    Abstract: The invention relates to a new pharmaceutical preparation of high acid-binding capacity, of delayed effect, of increased bioavailability for neutralization of gastric acid and optionally to other pharmaceutical preparations acting in the gastrointestinal tract, first of all of laxative effect by mixing 100 parts by mass of a powdered basic magnesium compound or the powdered mixture of basic magnesium compounds and basic aluminium compounds with 2-2500 parts of a dry or swollen organic acid of polymeric character and therapeutically acceptable, e.g. cellulose-glycolic acid, starch-glycolic acid or polymer acrylic and/or methacrylic acid, letting this powdered mixture to stand for 1-24 hours at the temperature of 20.degree.-80.degree. C.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: February 11, 1992
    Inventors: Istvan Racz, Janos Plachy, Peter Szentmiklost
  • Patent number: 5022972
    Abstract: The invention relates to a measuring method for determining the zeta-potential ZP of a material suspended in a liquid medium which comprises streaming the suspension in a laminar flow, subjecting the system to the effect of D.C. voltage, and determining the electroporetic velocity from the change of a flow velocity of a selected particle.
    Type: Grant
    Filed: March 20, 1988
    Date of Patent: June 11, 1991
    Assignee: MTA Kutatasi Eszkozoket Kivitelezo Vallata
    Inventors: Agoston David, Kenez nee DaMarai, Istvan Racz
  • Patent number: 4943678
    Abstract: The invention relates to pesticidal composition against bacterial plant diseases comprising as active ingredient a nitrofurane derivative of the general Formula I ##STR1## wherein X represents a group of the Formula a/ ##STR2## and optionally one or more known fungicidal active ingredient/s/ in a total amount of 1-99% by weight, whereby the ratio of the active ingredient of the general Formula I to the known fungicidal active ingredient/s/ amounts to 1:99-99:1, preferably 1:9-9:1 if the composition comprises two active ingredients and 1:9:0.5-1:1:5, preferably 1:4:1-1:1:4 if the composition comprises three active ingredients, respectively, in admixture with suitable inert solid or liquid carrier/s/ or diluent/s/ and usual auxiliary agents such as wetting agents, dispersing agents, adhesives, antifoaming agents and/or antifreezers.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: July 24, 1990
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt
    Inventors: Sandor Angyan, Gyula Oros, Istvan Racz, Tamas Detre
  • Patent number: 4921707
    Abstract: The invention relates to the production of a new pharmaceutical preparation of high acid-binding capacity, of delayed effect, of increased bioavailability for neutralization of gastric acid and eventually to other pharmaceutical preparations acting in the gastrointestinal tract, first of all of laxative effect by mixing 100 parts by mass of a powdered basic magnesium compound or the powdered mixture of basic magnesium compounds and basic aluminum compounds with 2-2500 parts of a dry or water-swollen organic acid of polymeric character and therapeutically acceptable, e.g. cellulose-glycolic acid, starch-glycolic acid or polymer acrylic and/or methacrylic acid, letting this powdered mixture to stand for 1-24 hours at the temperature of 20.degree.-80.degree. C.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: May 1, 1990
    Inventors: Istvan Racz, Janos Plachy, Peter Szentmiklosi
  • Patent number: 4826863
    Abstract: The present invention relates to a stabilized plant protecting agent suspension which can be characterized by containing 10 to 60% by weight of one or more active ingredients, 30 to 5% by weight of oily layer, 0 to 10% by weight of emulsifyer, 10 to 20% by weight of conventionally used excipient and water needed to 100% by weight while by increasing solid concentration oil concentration decreases.The invention also provides a process for the preparation of a stabilized plant protecting agent suspension by adding oil and optionally an emulsifyer and/or water containing layer to a suspension of a suitable particle size of the active ingredient and water soluble excipients, such as surfactants, optionally emulsifiers, dispersing agents, viscosity modifying agents, protective colloids and mixing together the suspension layer and the layer containing the oil with a stirrer of great shearing force and optionally adding to the obtained stabilized suspension further excipients, e.g.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: May 2, 1989
    Assignee: Chinoin Gyogyszer- es Vegyeszeti Termekek Gyara R.T.
    Inventors: Andras Szego, Viktoria Peterdi, Ferenc Kovats, Jozsef Sos, Istvan Racz, Sandor ngyan, Katalin Marmarosi nee Kellner
  • Patent number: 4761423
    Abstract: Fungicidal or insecticidal seed dressings characterized by a water content substantially greater than that of the carrier vehicle providing homogeneous coating.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: August 2, 1988
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Andras Szego, Jozsef Sos, Ferenc Kovats, Istvan Petroczi, Gyorgy Kis, Jozsef Karsai, Sandor ngyan, Istvan Racz, Katalin Marmarosi
  • Patent number: 4734432
    Abstract: The present invention relates to a stabilized plant protecting agent suspension which can be characterized by containing 10 to 60% by weight of one or more active ingredients, 30 to 5% by weight of oily layer, 0 to 10% by weight of emulsifier, 10 to 20% by weight of conventionally used excipient and water needed to 100% by weight while by increasing solid concentration oil concentration decreases. The invention also provides a process for the preparation of a stabilized plant protecting agent suspension by adding oil and optionally an emulsifier and/or water containing layer to a suspension of a suitable particle size of the active ingredient and water soluble excipients, such as surfactants, optionally emulsifiers, dispersing agents, viscosity modifying agents, protective colloids and mixing together the suspension layer and the layer containing the oil with a stirrer of great shearing force and optionally adding to the obtained stabilized suspension further excipients, e.g.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: March 29, 1988
    Assignee: Chinoin Gyogyszer- es Vegyeszeti Termekek Gyara R.T.
    Inventors: Andras Szego, Viktoria Peterdi, Ferenc Kovats, Jozsef Sos, Istvan Racz, Sandor ngyan, Katalin Marmarosi nee Kellner
  • Patent number: 4405353
    Abstract: The invention relates to carbofurane-containing plant protecting compositions. More particularly, the invention concerns insecticide compositions with improved plant growth accelerating properties, containing 1 to 50% by weight of 2,3-dihydro-2,3-dimethyl-7-benzofuranol methylcarbamate optionally along with usual amounts of additives conventionally used in the manufacture of plant protecting compositions, which comprises 50 to 99% by weight of a carrier granulate prepared by partial hydrolysis of vegetable waste matters, preferably corn-cob, corn-stalk, chopped wood or sawdust derived from broad leaved trees, rice hull, read or broaken reed, known per se.
    Type: Grant
    Filed: November 26, 1980
    Date of Patent: September 20, 1983
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Sandor Angyan, Istvan Racz, Erzsebet Radvanyi, Ferenc Kovats, Tamas Detre, Jozsef Sos
  • Patent number: 4199560
    Abstract: The present invention relates to a solid oral pharmaceutical preparation with protracted release of the active ingredient consisting of discrete solid granules containing the active ingredient soluble in the stomach and auxiliary agents and of an equally solid external phase surrounding the said granules, whereby the granules forming the internal phase consist of granules prepared from a powder mixture which contains as active ingredient, or in addition to it a non-toxic metal compound, being capable of binding an acid, and being insoluble or but slightly soluble in neutral aqueous medium--particularly bismuth, aluminium or magnesium compound--and auxiliary materials prepared with an aqueous emulsion containing a hydrophobic component and hydrophylic emulsifiers, and the external phase contains a solid, dry, amphoteric gel forming substance in an amount of 1-50 percent w/w related to the total weight of the preparation in admixture with auxiliary agents.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: April 22, 1980
    Assignee: Novex Talalmanyfejleszto Es Ertekesito Kulkereskedelmi Rt
    Inventors: Laszlo Gyarmati, Istvan Racz, Peter Szentmiklosi, Janos Plachy
  • Patent number: 4058608
    Abstract: The invention relates to a method of combatting phytopathogenic fungi, primarily powdery mildew. The method involves administering compositions according to the invention which contain as active principle at least one compound of the formula (I), ##STR1## wherein R.sup.1 is a C.sub.1-12 alkyl or a chloroethyl group,R.sup.2 is hydrogen, halogen, a C.sub.1-4 alkyl, a C.sub.1-4 alkoxy or nitro group,R.sup.3 is hydrogen, halogen, a C.sub.1-4 alkyl or nitro group, andR.sup.4 is hydrogen, halogen, a C.sub.1-4 alkyl or nitro group, or an acid addition salt thereof.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: November 15, 1977
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara RT
    Inventors: Tibor Zsolnai, Gyorgy Lugosi, Istvan Szepesi, Maria Bakonyi, Istvan Racz, Erzsebet Radvany nee Hegedus