Patents by Inventor Erich Wanek

Erich Wanek 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: 6395801
    Abstract: The invention relates to impression compositions based on vulcanizable polyether materials, which are characterized in that the ready-mixed pastes comprise a) approx. 30 to 70 wt. % of aziridino-polyether, b) approx. 5 to 20 wt. % of a triacyl glyceride of non-animal origin which has a stearoyl content of ≧70 wt. %, based on the acyl content of the triacyl glyceride, or, in the case of a lower stearoyl content and if this adversely influences the storage stability of the impression composition, has been esterified in itself beforehand, and c) approx. 10 to 65 wt. % of customary catalysts, auxiliaries and additives, in each case based on the total weight of the composition. The impression compositions are distinguished by consistently good mechanical properties of the polymerized materials, have a comparatively low proportion of aziridino-polyether, which has a favorable effect on their preparation costs, and can easily be mixed.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: May 28, 2002
    Assignee: Thera Patent GmbH & Co KG Gesellschaft fur Industrielle Schutzrechte
    Inventors: Peter Bissinger, G√ľnther Lechner, Erich Wanek
  • Patent number: 6383279
    Abstract: A dental impression composition comprises a polyether derivative functionalized via the hydroxyl groups of a polyether polyol with groups such as aziridine, epoxide and unsaturated substituents including (meth)acrylic, allyl, vinyl, vinyl ether or maleate groups, wherein the level of cyclic oligomeric polyethers is less than 5.0 weight percent.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: May 7, 2002
    Assignee: ESPE Dental AG
    Inventors: Gunther Eckhardt, Erich Wanek, Guenther Lechner, Peter Bissinger, Markus Mikulla
  • Patent number: 6127449
    Abstract: The invention relates to impression compositions based on vulcanizable pother materials, which are characterized in that the ready-mixed pastes comprisea) approx. 30 to 70 wt. % of aziridino-polyether,b) approx. 5 to 20 wt. % of a triacyl glyceride of non-animal origin which has a stearoyl content of .gtoreq.70 wt. %, based on the acyl content of the triacyl glyceride, or, in the case of a lower stearoyl content and if this adversely influences the storage stability of the impression composition, has been esterified in itself beforehand, andc) approx. 10 to 65 wt. % of customary catalysts, auxiliaries and additives,in each case based on the total weight of the composition.The impression compositions are distinguished by consistently good mechanical properties of the polymerized materials, have a comparatively low proportion of aziridino-polyether, which has a favourable effect on their preparation costs, and can easily be mixed.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: October 3, 2000
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle Schutzrechte
    Inventors: Peter Bissinger, Gunther Lechner, Erich Wanek
  • Patent number: 6121362
    Abstract: A monophase silicone impression composition which crosslinks by an addition reaction, includes the following components:(a) organopolysiloxanes with at least two unsaturated groups in the molecule,(b) organohydrogenpolysiloxanes with at least 2 SiH groups in the molecule,(c) optionally, organopolysiloxane without reactive groups,(d) a platinum catalyst,(e) a hydrophilizing agent,(f) diatomaceous earth,(g) a filler, and(h) optionally further customary additives, auxiliaries and dyestuffs, the amount of component (f) is 8 to 25 wt. %, based on the total weight of the cured composition, and the composition has a Shore hardness A to be determined in accordance with DIN 53505, of less than 45--measured after 30 minutes--, and a viscosity, determined in accordance with ISO 4823, of 31 to 39 mm. The impression composition is suitable for the production of provisional bridges and crowns.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: September 19, 2000
    Assignee: ESPE Dental AG
    Inventors: Erich Wanek, Joachim Zech
  • Patent number: 5849812
    Abstract: An addition-crosslinking polyether impression material is described which ntains(a) at least one polyether which has at least two optionally substituted vinyl and/or allyl end-groups,(b) an SiH component,(c) at least one platinum catalyst,(d) optionally usual additives, and(e) an organopolysiloxane with at least two alkenyl groups.The impression material has in at least two-part form of administration in which the components (b) and (c) are spatially separated from each other a particularly satisfactory storage stability and has good mechanical properties in the cured state.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: December 15, 1998
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur Industrielle Schutzrechte
    Inventors: Joachim Zech, Erich Wanek
  • Patent number: 5824720
    Abstract: The invention relates to fluoride-releasing, polymerizable dental composite aterials having good mechanical stability, containing:(a) one or more ethylenically unsaturated polymerizable monomers based on di- or multi-functional (meth)acrylates;(b) initiators and optionally activators; and(c) usual fillers, and optionally pigments, thixotropic agents, plasticizers and other auxiliaries; and(d) one or more sufficiently water-soluble inorganic complex fluorides of the general formulaA.sub.n MF.sub.mwherein,A is a monovalent cation, M is a metal of the III-V main group or II-V sub-group, n is a whole number from 1 to 3 and m is whole number from 3 to 6.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: October 20, 1998
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle Schutzrechte
    Inventors: Reinhold Nowak, Erich Wanek, Bernd Gangnus
  • Patent number: 5750589
    Abstract: The present invention relates to dental impression compounds which contain as hydrophilation agent 0.1 to 10 wt.-%, relative to the total weight of the compound, of a polyether carbosilane.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: May 12, 1998
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur
    Inventors: Joachim Zech, Erich Wanek, Gunther Lechner, Peter Bissinger
  • Patent number: 5569691
    Abstract: The invention relates to a rubber-elastic composition which comprises a polyether material, and which in the completely vulcanized and completely polymerized form, contain 0.1 to 15 wt. %, relative to the total weight of the composition, of at least one hydrophilic nature imparting agent selecting from the group consisting of a hydrophilic silicone oil having one or more siloxane groups as a hydrophobic part and one or more ether groups as a hydrophilic part, a fluorinated hydro-carbon, a block copolymer of ethylene oxide/propylene oxide, a fatty alcohol derivative, an alkyl phenol derivative, a fatty amine, an amine oxide, a fatty acid glycol and glycerin derivative, a fatty acid, and a fatty acid monoester. The composition is suitable as dental impression composition and has, in the completely polymerized state, even with multiple disinfections in an aqueous disinfecting solution, a continuing good ability to flow on (small wetting angle) and an unchanged dimensional stability.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: October 29, 1996
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur Industrielle Schutzrechte
    Inventors: Rainer Guggenberger, Erich Wanek, Oswald Gasser
  • Patent number: 5425771
    Abstract: Bone replacement parts consisting of glass ionomer cement are superior to those made of ceramics especially since they may easily be produced and machined using common grinding and milling tools. The required prosthesis part may therefore be formed of freshly mixed glass ionomer cement during the respective operation, or an industrially prefabricated formed body approximating the idealized shape of the bone part to be replaced may be adapted to the anatomic conditions given.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: June 20, 1995
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle Schutzrechte
    Inventors: Jan Helms, Gotz Geyer, Erich Wanek, Werner Zollner, Oswald Gasser
  • Patent number: 5314474
    Abstract: Bone replacement parts consisting of glass ionomer cement are superior to those made of ceramics especially since they may easily be produced and machined using common grinding and milling tools. The required prosthesis part may therefore be formed of freshly mixed glass ionomer cement during the respective operation, or an industrially prefabricated formed body approximating the idealized shape of the bone part to be replaced may be adapted to the anatomic conditions given.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: May 24, 1994
    Assignee: THERA Patent GmbH & Co. KG, Gesellschaft fur industrielle Schutzrechte
    Inventors: Jan Helms, Gotz Geyer, Erich Wanek, Werner Zollner, Oswald Gasser
  • Patent number: 5224957
    Abstract: A method is provided for treating cataracts and other eye diseases, and includes the use of photopolymerizable compositions for preparing an intraocular-lens filling material which is used during an operation with an inserted intraocular-lens shell. The photopolymerizable compositions contain the following components:a) 90-99.99% by weight, preferably 94-99.799% by weight of at least one at least difunctional acrylic and/or methacrylic acid ester,b) 0.01-5% by weight, preferably 0.1-2% by weight, of at least one photoinitiator which is activatable with light in the wavelength range 400-500 nm,c) 0-9.98% by weight, preferably 0.001-2% by weight, of a UV-absorber which can absorb light of wavelengths <400 nm, andd) 0-9.98% by weight, preferably 0.1-2% by weight, of other auxiliary substances, such as dyes or activators for the photoinitiator, for example tertiary amines,the quantity particulars referring in each case to the total mass.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: July 6, 1993
    Assignees: THERA Patent GmbH & Co., KG Gesellschaft fur industrielle Schutzrechte
    Inventors: Oswald Gasser, Erich Wanek, Rainer Guggenberger, Klaus-Peter Stefan, Klaus Ellrich
  • Patent number: 5154791
    Abstract: A method for bonding or potting substrates by means of cationically polymerizable masses being activated before joining or potting by irradiation with visible light and curing after joining or potting of the substrates without the irradiation being continued is described as well as an apparatus for executing this method. By irradiation with light having a wavelength of from 400 to 600 nm for photo-activation of said masses, a prolonged pot life of said masses without reducing their wetting ability during pot life is obtained such that the masses are unlimitedly applicable for more than 30, preferably more than 100 sec. after exposure is finished. The apparatus according to the invention comprises a source of irradiation which exclusively emits light having a wavelength of >400 nm.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: October 13, 1992
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle
    Inventors: Oswald Gasser, Erich Wanek, Klaus Ellrich, Rainer Guggenberger
  • Patent number: 5147904
    Abstract: Open-pored moldings containing the product of the foaming and setting of (a) an aluminum fluorosilicate glass, (b) at least one polycarboxylic acid with an average molecular weight of >500, (c) a foaming agent, other than carbonates and/or hydrogen-carbonates, (d) optionally a chelating agent and (e) water, are suitable in particular as bone substitute material.Production is carried out by homogeneously mixing (a), (b), (c), optionally (d), and (e), then foaming, shaping and setting.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: September 15, 1992
    Assignee: Thera Patent GmbH & Co. KG
    Inventors: Peter Jochum, Oswald Gasser, Manfred Holupirek, Erich Wanek, Rainer Guggenberger, Klaus-Peter Stefan, Klaus Ellrich
  • Patent number: 5100929
    Abstract: Photopolymerizable dental compositions are proposed which are curable with visible light and which apart from usual auxiliary substances and additives contain polymerizable monomers of the group of the poly-thiol compounds and of the group of the poly-ene compounds and a photoinitiator and which, in order to obtain a curing free from any smeary layer, contain at least 10% by weight poly-thiol compound(s), at least 10% by weight poly-ene compound(s) and 0.01 to 5% by weight of at least one acyl phosphine compound as photoinitiator. The compositions can advantageously be used as dental impression compositions.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: March 31, 1992
    Assignee: Espe Stiftung & Co. Produktion- und Vertriebs KG
    Inventors: Peter Jochum, Oswald Gasser, Erich Wanek, Rainer Guggenberger, Klaus Ellrich
  • Patent number: 5017110
    Abstract: For the continuous automated production of powders that are well suited for hot pressing, i.e. those consisting essentially of spherical or cubic particles, of high-temperature resistant polymers without damage to the polymer structure in the course of the production process, a concentrated solution of the polymer in an aprotic polar solvent is continuously expressed into a twisting cone of hot aqueous precipitant. In doing so, short irregular wormy formations form, which are united to a fleece-like web, washed with aqueous solvents and finally with water, dried and comminuted. The plant provided for carrying out the process requires comparatively little space, since it does not include treatment tanks for extraction and drying.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: May 21, 1991
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Erich Wanek, Josef Baumgartinger, Manfred Schobesberger, Rupert Stadlbauer, Klaus Weinrotter
  • Patent number: 4978359
    Abstract: For anchoring a prosthesis within a bone by means of a bone cement (32), prothesis shaft has a surface which is formed by the surfaces of a plurality of spheres (23 . . . 25) partially penetrating each other and having radii which decrease from the proximal towards the distal shaft end. The transitional zones between adjacent spheres (23 . . . 25) are concavely rounded. This shape is especially suited for use with a glass ionomer-type bone cement, because the shaft exerts substantially only compressive forces on the cement, whereas tensile and notch stresses, with respect to which this kind of cement exhibits little resistance, are largely avoided.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: December 18, 1990
    Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle Schutzrechte
    Inventors: Klaus Wilhelm, Johann Bauer, Werner Schmitt, Wolf-Dietrich Herold, Peter Koran, Erich Wanek, Oswald Gasser
  • Patent number: 4916805
    Abstract: For the attachment of components using the SMT method a procedure is suggested in which the adhesive used is activated prior to fitting of the components to the circuit board by irradiation with light having a wavelength in the range of 200 to 600 nm to such an extent that the desired initial tackiness is maintained and there is no formation of skin on the surface of the adhesive. This makes it possible to cause the adhesive composition to fully cure in a shorter time and at lower temperature than has been possible so far without the wettability of the adhesive during the fitting of the components to the circuit board being impaired.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: April 17, 1990
    Assignee: Espe Stiftung & Co. Produktions- und Vertriebs KG
    Inventors: Klaus Ellrich, Oswald Gasser, Rainer Guggenberger, Erich Wanek
  • Patent number: 4897227
    Abstract: For the continuous automated production of powders that are well suited for hot pressing--i.e. those consisting essentially of spherical or cubic particles, of high-temperature resistant polymers without damage to the polymer structure in the course of the production process, a concentrated solution of the polymer in an aprotic polar solvent is continuously expressed into a twisting cone of hot aqueous precipitant. In doing so, short irregular wormy formations form, which are united to a fleece-like web, washed with aqueous solvents and finally with water, dried and comminuted. The plant provided for carrying out the process requires comparatively little space, since it does not include treatment tanks for extraction and drying.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: January 30, 1990
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Erich Wanek, Josef Baumgartinger, Manfred Schobesberger, Rupert Stadlbauer, Klaus Weinrotter