Granted Patent
Utility
US 5,512,271 · App. 08/266,849
Silicas for use in transparent toothpaste compositions
Inventors:
Ian P. McKeown, Peter W. Stanier
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Jul 5, 1994
Inventors
Ian P. McKeown
Peter W. Stanier
Assignee (at issue)
Unilever Patent Holdings B.V.
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.