Granted Patent
Utility
US 4,331,579 · App. 06/232,899
Adhesive to adhere impervious and felt backed vinyl sheet material to damp concrete
Inventor:
Laurence F. Haemer
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Feb 9, 1981
Inventor
Laurence F. Haemer
Assignee (at issue)
CONGOLEUM 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.