Patents by Inventor Chryssostomos Chatgilialoglu

Chryssostomos Chatgilialoglu 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).

  • Polysilane stabitizers containing sterically hindered amine groups
    Patent number: 6538055
    Abstract: A compound containing a silane backbone and a group of formula (A) wherein R is hydrogen, C1-C8alkyl, —O, —OH, —CH2CN, C1-C18alkoxy, C5-C12cycloalkoxy, C3-C6alkenyl, C7-C9phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C1-C4alkyl; or C1-C8acyl; is useful for stabilizing an organic material against degradation induced by light, heat or oxidation.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: March 25, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Primo Carrozza, Valerio Borzatta, Giovanni Da Roit, Chryssostomos Chatgilialoglu
  • Polysilanes
    Patent number: 6005036
    Abstract: A composition containing an organic material subject to oxidative, thermal or actinic degradation can be stabilized by an effective amount of at least one polysilane compound of formula I ##STR1## Preferred compounds are where q is zero, p is 2 to 50, m is zero, R.sub.1 is alkyl, phenyl or benzyl, and A and B are independently hydrogen or a group --Si(E).sub.3 where E is alkyl. These compounds can also be copolymeric having a random, alternate or block distribution of individual structural units. These compounds are particularly suitable as process stabilizers.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: December 21, 1999
    Assignee: Ciba Specialty Chemical Corporation
    Inventors: Primo Carrozza, Valerio Borzatta, Chryssostomos Chatgilialoglu