Granted Patent
Utility
US 4,792,400 · App. 07/023,338
Insoluble vinyl lactam clarifiers
Inventors:
James A. Dougherty, Harold O. Locke, Fulvio J. Vara, Robert B. Login, Terry E. Smith
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Mar 9, 1987
Inventors
James A. Dougherty
Harold O. Locke
Fulvio J. Vara
Robert B. Login
Terry E. Smith
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.