Patents by Inventor Walter Siegrist

Walter Siegrist 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).

  • Catalysts for the preparation of methylpyridine
    Patent number: 8946115
    Abstract: Subject of the invention is a dehydrogenation catalyst for dehydrogenating methylpiperidine to methylpyridine. Subject of the invention are also methods for preparing the catalysts obtained thereby and methods, in which the catalysts are used.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: February 3, 2015
    Assignee: Lonza Ltd
    Inventors: Daniel Pianzola, Walter Siegrist
  • CATALYSTS FOR THE PREPARATION OF METHYLPYRIDINE
    Publication number: 20140051569
    Abstract: Subject of the invention is a dehydrogenation catalyst for dehydrogenating methylpiperidine to methylpyridine. Subject of the invention are also methods for preparing the catalysts obtained thereby and methods, in which the catalysts are used.
    Type: Application
    Filed: August 29, 2013
    Publication date: February 20, 2014
    Applicant: LONZA LTD.
    Inventors: Daniel Pianzola, Walter Siegrist
  • Catalysts for the preparation of methylpyridine
    Patent number: 8530664
    Abstract: Subject of the invention is a dehydrogenation catalyst for dehydrogenating methylpiperidine to methylpyridine. Subject of the invention are also methods for preparing the catalysts obtained thereby and methods, in which the catalysts are used.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: September 10, 2013
    Assignee: Lonza Ltd.
    Inventors: Daniel Pianzola, Walter Siegrist
  • CATALYSTS FOR THE PREPARATION OF METHYLPYRIDINE
    Publication number: 20110092711
    Abstract: Subject of the invention is a dehydrogenation catalyst for dehydrogenating methylpiperidine to methylpyridine. Subject of the invention are also methods for preparing the catalysts obtained thereby and methods, in which the catalysts are used.
    Type: Application
    Filed: October 13, 2010
    Publication date: April 21, 2011
    Inventors: Daniel Pianzola, Walter Siegrist
  • Process for the preparation of 3-methylpiperidine and 3-methylpyridine by catalytic cyclization of 2-methyl-1, 5-diaminopentane
    Patent number: 5714610
    Abstract: In a process for preparing 3-methylpiperidine or 3-methylpyridine from 2-methyl-1,5-diaminopentane in the gaseous phase, the initial product is made to flow over catalysts. In the first step, 3-methylpiperidine is produced, and if required 3-methylpyridine is produced in a second step.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: February 3, 1998
    Assignee: Lonza Ltd.
    Inventors: Josef Heveling, Erich Armbruster, Walter Siegrist
  • Fuel paste and process for its production
    Patent number: 3964880
    Abstract: A fuel paste which includes ethanol, an ethanol-soluble thickening agent and an inorganic fuel carrier mixture of silicon dioxide and (i) an oxide of silicon, other than silicon dioxide, (ii) an oxide of titanium, (iii) an oxide of zirconium, (iv) an oxide of aluminium, (v) a carbonate of an alkali metal, (vi) a carbonate of an alkaline earth metal, (vii) a hydroxide of an alkali metal, (viii) a hydroxide of an alkaline earth metal or (ix) a combination of two or more members of (i) to (viii). The fuel paste is non-thixotropic and is soft and plastic. The fuel paste has a number of other advantages. A process of preparing the fuel paste.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: June 22, 1976
    Assignee: Lonza Ltd.
    Inventor: Walter Siegrist