Patents by Inventor Carlos Marco Rocha

Carlos Marco Rocha 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).

  • Process for obtaining cholesteric liquid crystals by stereoselective recrystallization
    Patent number: 6165382
    Abstract: Process for synthesizing polymers+PTOBEE (C26H20O8)n and PTOBDME (C34H36O8)n, with the addition of acid dichloride and DL treo-1,2-butanediol in Cl-naphthalene and DL-1,2-dodecanediol with diphenyl oxide, respectively, by passing them through a nitrogen stream at room temperature, heating the mixture, settling in toluene the mixture and filtering. In the resulting settling toluene, the polymer precipitates the enantiomer (-)PTOBEE. The compounds obtained are of the cholesteric liquid crystal type, obtained by stereoselective recrystallization in toluene.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: December 26, 2000
    Assignee: Consejo Superior de Investigaciones Cientificas
    Inventors: Maria Mercedes Perez Mendez, Carlos Marco Rocha