Patents by Inventor Renée Claude

Renée Claude 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).

  • Methods and devices having means for writing storing and erasing which comprise an active medium containing at least one spin-transition parent compound
    Patent number: 6255026
    Abstract: A chemical composition is provided for the manufacture of devices for storing and/or displaying information, comprising a network having a molecule which is formed from a metallic element Fe(II) which is bonded to a 1-2-4 triazole ligand (H-Trz), which molecule further comprises one or more than one anions A selected from BF4−, ClO4−, CO32−, Br−, Cl−, in accordance with the formulation: FeII(H-Trz)3A2, characterized in that this composition is used in the pure state in either one of the two crystalline phases (&agr;,&bgr;) at least one of which, referred to as the second phase (&bgr;), can be thermally induced on the basis of the other phase, referred to as the first phase (&agr;), at a temperature which is equal to or higher than a first reference temperature (To), which phases each show thermally inducible spin transitions between a low-spin state at a low first temperature (T&agr;1, T&bgr;1) and a high-spin state at a high second temperature (T&agr;2, T&bgr;2), the spin tran
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: July 3, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Olivier Kahn, Charlotte Jay, Jonas Krober, Renée Claude, Françoise Groliere
  • Spin-transition parent compounds
    Patent number: 6200730
    Abstract: A chemical composition is provided for the manufacture of devices for storing and/or displaying information, comprising a network having a molecule which is formed from a metallic element Fe(II) which is bonded to a 1-2-4 triazole ligand (H-Trz), which molecule further comprises one or more than one anions A selected from BF4−, ClO4−, CO32−, Br−, Cl−, in accordance with the formulation: FeII (H-Trz)3A2, characterized in that this composition is used in the pure state in either one of the two crystalline phases (&agr;, &bgr;) at least one of which, referred to as the second phase (&bgr;), can be thermally induced on the basis of the other phase, referred to as the first phase (&agr;), at a temperature which is equal to or higher than a first reference temperature (To), which phases each show thermally inducible spin transitions between a low-spin state at a low first temperature (T&agr;1, T&bgr;1) and a high-spin state at a high second temperature (T&agr;2, T&bgr;2), the spin tr
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: March 13, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Olivier Khan, Charlotte Jay, Jonas Krober, Renee Claude, Francoise Groliere
  • Spin-transition parent compounds and devices having means for writing, storing and erasing, which comprise an active medium containing at least one of said compounds
    Patent number: 6043008
    Abstract: A chemical composition is provided for the manufacture of devices for storing and/or displaying information, comprising a network having a molecule which is formed from a metallic element Fe.sub.(II) which is bonded to a 1-2-4 triazole ligand (H-Trz), which molecule further comprises one or more than one anions A selected from BF.sub.4.sup.-, ClO.sub.4.sup.-, CO.sub.3.sup.2-, Br.sup.-, Cl.sup.-, in accordance with the formulation:Fe.sub.II (H-Trz).sub.3 A.sub.2,characterized in that this composition is used in the pure state in either one of the two crystalline phases (.alpha., .beta.) at least one of which, referred to as the second phase (.beta.), can be thermally induced on the basis of the other phase, referred to as the first phase (.alpha.), at a temperature which is equal to or higher than a first reference temperature (To), which phases each show thermally inducible spin transitions between a low-spin state at a low first temperature (T.sub..alpha.1, T.sub..beta.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: March 28, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Olivier Kahn, Charlotte Jay, Jonas Krober, Renee Claude, Fran.cedilla.oise Groliere