Granted Patent
Utility
US 6,585,820 · App. 09/993,196
Water-resistant gypsum formulations
Inventors:
Steven J. Wantling, Bonnie Zepka
Patented Case
View Patent ↗
Granted: Jul 1, 2003
Filed: Nov 16, 2001
Inventors
Steven J. Wantling
Bonnie Zepka
Assignees (at issue)
Fleet Capital Corporation
Fllet Capital Canada Corporation
Fleet National Bank, London U.K., Branch
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.