Patents Represented by Attorney Martha L. Heslin & Rothenberg, P.C. Boden, Esq.
  • Patent number: 5959159
    Abstract: A process for resolving racemic diesters of (R,S)(.+-.)-5-hydroxy-3-(4'-hydroxyphenyl)-1,1,3-trimethylindane is disclosed. The process utilizes a microbial enzyme derived from Chromobacterium viscosum to catalyze the enantioselective and regioselective hydrolysis of the (S)(-)-enantiomer of the racemic mixture to its corresponding monoester at a faster rate than the (R)(+)-enantiomer. A substantially pure (S)(-)-indane monoester is thereby formed, while the (R)(+)-indane diester remains unreacted. The (S)(-)-monoester and the (R)(+)-diester can then be hydrolyzed using conventional techniques to form optically active (R)(+)- and (S)(-)-5-hydroxy-3-(4'-hydroxyphenyl)-1,1,3-trimethylindane enantiomers for use as monomers in the synthesis of chiral polymers.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: September 28, 1999
    Assignee: Molecular OptoElectronics Corporation
    Inventors: Romas Joseph Kazlauskas, Xiaoming Zhang
  • Patent number: 5883218
    Abstract: Optically active polycarbonate, polyester, and polyurethane polymers prepared from monomers containing optically pure spirobiindane moieties are disclosed. The chiral spirobiindane polymers are of high molecular weight and exhibit high optical rotations. In addition, the optically active polymers are useful in the fabrication of optoelectronics devices and as polarizing coatings or filters or as polarized lenses.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: March 16, 1999
    Assignee: Molecular OptoElectronics Corporation
    Inventors: Janet L. Gordon, Kevin R. Stewart, Kwok Pong Chan