Granted Patent
Utility
US 4,844,944 · App. 07/134,822
Lightweight, durable plumbing fixture fabricated from a delamination-resistant multilayer polymeric composite
Inventors:
Peter U. Graefe, Karl T. Kuszaj
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Dec 18, 1987
Inventors
Peter U. Graefe
Karl T. Kuszaj
Assignee (at issue)
American Standard 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.