Patents by Inventor Prithipal Singh

Prithipal Singh 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).

  • Cyclic and polycyclic diazadioxides as quenchers and radical inhibitors
    Patent number: 3953444
    Abstract: Heterocyclic diazadioxides, having the two nitrogen atoms as annular atoms, are employed as quenchers for molecules in the excited state. The compounds can be used in combination with polymers and pigments for protection against light and oxidative attack. The products are also found to be efficient free radical inhibitors. Heterocyclic mono- and polycyclic diazadioxides are provided. All of the compounds are found to have relatively low triplet energy values.
    Type: Grant
    Filed: May 9, 1973
    Date of Patent: April 27, 1976
    Assignee: Syva Company
    Inventors: Prithipal Singh, Edwin F. Ullman