Granted Patent
Utility
US 5,969,167 · App. 08/953,057
Method for making tris(hydroxyphenyl) compounds using ion exchange resins
Inventors:
Swaminathan Sivaram, Vishnu Ramchandra Ranade, Srinivasan Chakrapani, Prakash P. Wadgonkar, Paul Dean Sybert, Gaylord M. Kissinger, Ashok K. Mendiratta
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Oct 17, 1997
Inventors
Swaminathan Sivaram
Vishnu Ramchandra Ranade
Srinivasan Chakrapani
Prakash P. Wadgonkar
Paul Dean Sybert
Gaylord M. Kissinger
Ashok K. Mendiratta
Assignee (at issue)
General Electric Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.