Patents by Inventor Katharina EHRMANN

Katharina EHRMANN 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).

  • Publication number: 20240287304
    Abstract: The use of a photopolymerizable composition containing a phenol formaldehyde resin, a curing agent, and a photoinitiator in a generative manufacturing method for producing three-dimensional objects by irradiating it layer by layer to cure the composition is described. The use involves the following steps: a) the composition is heated to a reaction temperature of at least 70° C. before and during curing; b) the composition contains: b1) a novolak as said phenol formaldehyde resin, b2) a formaldehyde derivative stable at the reaction temperature as said curing agent, and b3) a photoacid generator as said photoinitiator; and c) curing of the composition is conducted at normal pressure; with the proviso that the curing agent is not an amine-containing formaldehyde derivative.
    Type: Application
    Filed: June 14, 2022
    Publication date: August 29, 2024
    Inventors: Robert LISKA, Raffael Johannes Bodo WOLFF, Patrick KNAACK, Jürgen STAMPFL, Katharina EHRMANN
  • Publication number: 20240238076
    Abstract: A thermoplastic poly(urethane-urea) polyadduct (I) with sterically hindered urea groups used in an electrospinning method for producing vascular prostheses: I, M, C1 and C2 represent bivalent radicals linked via a urethane or urea moiety; I and C2 represent a bivalent, saturated or unsaturated, aliphatic, alicyclic or aromatic radical with 1-20 carbon atoms derived from (I): a diisocyanate; or (C2): from a diol, diamine or amino alcohol; M represents a bivalent radical of an aliphatic polyether, polyester or polycarbonate derived from a macrodiol having Mn?500; C1 represents a bivalent, saturated or unsaturated, aliphatic or alicyclic radical with 1-30 carbon atoms derived from a diamine or amino alcohol with ?1 sterically hindered secondary amino group through removal of one N-linked hydrogen atom of the diamine or one N-linked and the O-linked hydrogen atoms of the amino alcohol.
    Type: Application
    Filed: January 28, 2022
    Publication date: July 18, 2024
    Inventors: Stefan BAUDIS, Helga BERGMEISTER, Katharina EHRMANN, Christian GRASL, Robert LISKA, Bruno PODESSER, Heinrich SCHIMA
  • Publication number: 20230272148
    Abstract: A thermoplastic poly(urethane-urea) polyadduct with sterically hindered urea groups of the following Formula (I): —[I-M-(I—C1)a—(I-M)b-(I—C2)c]n-??(I) I, M, C1 and C2 each representing bivalent residues linked to each other via a urethane or urea moiety. In the residues I, C1 and C2, when more than four carbon atoms are present, optionally at least one of them is substituted by a heteroatom selected from oxygen and nitrogen. Optionally at least one of the residues I, M, C1 and C2 includes one or more ester moieties. a, b and c each independently represent an integer from 0 to 10, and n is a number ?3 representing the number of blocks in the polyadduct. Within each separate block a+c?1, and in all blocks together at least one a?1 and at least one c?1.
    Type: Application
    Filed: July 5, 2021
    Publication date: August 31, 2023
    Inventors: Katharina EHRMANN, Stefan BAUDIS, Robert LISKA, Markus FITZKA