Granted Patent
Utility
US 4,928,835 · App. 07/304,469
Injection molded preform, method of treating same and container formed therefrom
Inventors:
Wayne N. Collette, Ralph Armstrong
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Jan 31, 1989
Inventors
Wayne N. Collette
Ralph Armstrong
Assignee (at issue)
Continental PET Technologies, Inc.
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.