Patents by Inventor Joachim Zech

Joachim Zech 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: 6677393
    Abstract: The invention relates to silicone-based addition-crosslinking impression material, containing (a) organopolysiloxanes with at least two unsaturated groups in the molecule, (b) organohydrogen polysiloxanes with at least three Si—H groups in the molecule, (c) optionally, organopolysiloxanes without reactive groups, (d) platinum catalyst, (e) optionally, hydrophilizing agent, (f) filler, (g) optionally, further customary additives, auxiliaries and dyes, characterized in that it contains, as component (h), polyalkylene oxide and/or its derivatives with an average molar mass of Mw>1000 at the rate of 0.001 to 1.0 wt.-% relative to the total mass of the cured material.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: January 13, 2004
    Assignee: 3M ESPE AG
    Inventors: Joachim Zech, Erich Wanek
  • Patent number: 6566413
    Abstract: The invention relates to novel cyclic siloxane compounds of the following general formula (I): in which: n=0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 preferably 1, 2, 3, 4, 5; A=H or C1-C15 alk(en)yl, C3-C15 cycloalk(en)yl, C6-C12 aryl, C8-C18 alkaryl, where, in the said radicals, in each case one or more C atoms can be replaced by O, C═O, O(C═O), SiR2 and/or NR, R being an aliphatic radical with 1 to 7 C atoms, in which one or more C atoms can be replaced by O, C═O, and/or O(C═O); B=E or a linear, branched or polycyclic aliphatic- or aromatic-groups-containing hydrocarbon radical which links 2 to 10 of the cyclosiloxane radicals defined above, less B, to one another and contains 2 to 50 C atoms and additionally 0 to 30 other atoms from the group O, N, S, P, Si, Cl, F, Br, I and from which correspondingly 1 to 9, preferably 1 to 4 of the above defined cyclosiloxane radicals, less B, are pending; E=A or a polymerizable group G—Q—L, where o
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: May 20, 2003
    Assignee: 3M ESPE AG
    Inventors: Wolfgang Weinmann, Joachim Zech, Oswald Gasser, Rainer Guggenberger, Gunther Eckhardt, Peter Bissinger, Wolfgang Soglowek
  • Patent number: 6457973
    Abstract: A dental impression tray has a wall member which, in the working position of the tray, is disposed on the inner surface facing the jaw, is opposite the dental arch which faces the palate or tongue, respectively, and forms a flow surface for directing impression material into the region between a tooth or stub and the gingiva to prevent voids in the solidified impression.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: October 1, 2002
    Assignee: ESPE Dental AG
    Inventors: Johann Fetz, Ingo Wagner, Joachim Zech
  • Publication number: 20020002212
    Abstract: The invention relates to polymerizable compositions comprising
    Type: Application
    Filed: January 16, 2001
    Publication date: January 3, 2002
    Applicant: Espe Dental AG
    Inventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
  • Patent number: 6335413
    Abstract: The invention relates to curable materials containing (A) optionally organopolysiloxanes with at least two unsaturated groups in the molecule, (B) organohydrogenpolysiloxanes with at least 3 SiH groups in molecule, (C) optionally organopolysiloxanes without reactive groups (D) catalyst (E) optionally hydrophilizing agents, (F) fillers and (G) optionally conventional dental additives, adjuvants and colorants, and (H) at least one silane dendrimer with terminal alkenyl groups The materials are particularly suitable for dental materials and are characterized by a particularly good end hardness with excellent processing viscosity.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: January 1, 2002
    Assignee: ESPE Dental AG
    Inventors: Joachim Zech, Gunther Lechner
  • Patent number: 6302690
    Abstract: A dental impression tray comprises a mold shell made of synthetic material and having an inner space for receiving the impression material, and a support shell made of metal and surrounding the exterior of the mold shell in order to provide the overall impression tray with the rigidity and dimensional stability required for taking precisely fitting impressions. The support shell may be detachably connected to the mold shell by positive or non-positive engagement. While the mold shell including the impression material is passed on to the technician who will produce a model of the teeth from which the impression was taken and who may subsequently dispose of the mold shell including the impression material, the support shell will remain with the dentist, immediately ready for reuse upon sterilization.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: October 16, 2001
    Assignee: ESPE Dental AG
    Inventors: Gerd Brandhorst, Johann Fetz, Ingo Wagner, Joachim Zech
  • Patent number: 6245828
    Abstract: The present invention is directed to polymerizable dental compositions containing a) 3 to 80 wt. % of cycloaliphatic epoxides; b) 0 to 80 wt. % of an epoxide or a mixture of epoxides which are different from a); c) 3 to 85 wt. % of a filer material; d) 0.01 to 25 wt. % of initiators, inhibitors and/or accelerators; e) 0 to 25 wt. % of auxiliary agents, the individual percentages of which are in relation to the total weight. The new polymerizable agents are particularly suited as dental material.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: June 12, 2001
    Assignee: ESPE Dental AG
    Inventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
  • 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: 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: 4478994
    Abstract: Unsaturated polyesters based on isophthalic acid are used as additive binders in coating agents. With the use of these polyesters, the resultant coatings have an adhesiveness to metallic substrates to be protected which is improved in relation to the comparable state of the art coatings. Furthermore, coatings are obtained by which the conditions for the protection of metals from corrosion (good adhesion of the coatings on metallic, in particular, critical metallic substrates, and good resistance of the coatings to environmental influences, in particular, good resistance to hydrolysis) are improved. Hence, improved protection from corrosion is achieved.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: October 23, 1984
    Assignee: Chemische Werke Huels
    Inventors: Joerg Doerffel, Hans-Joachim Zech