Granted Patent
Utility
US 4,283,326 · App. 06/101,950
PBT Molding compositions containing mica and a composite polymer
Inventors:
John J. Charles, Robert C. Gasman
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Dec 26, 1979
Inventors
John J. Charles
Robert C. Gasman
Assignee (at issue)
GAF Corporation
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.