Granted Patent
Utility
US 4,034,928 · App. 05/701,008
Method and apparatus for producing coreless roll assemblies of separable bags
Inventors:
James A. McDonald, Robert W. Wolfe, Walter Theodore Bilik
Patented Case
View Patent ↗
Granted: Jul 12, 1977
Filed: Jun 29, 1976
Inventors
James A. McDonald
Robert W. Wolfe
Walter Theodore Bilik
Assignee (at issue)
Union Carbide 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.