Granted Patent
Utility
US 6,753,381 · App. 10/099,615
Polymer blends and their application as viscosity index improvers
Inventors:
Munmaya K. Mishra, Raymond G. Saxton, Luis C. Salazar, Gary J. Spedale
Patented Case
View Patent ↗
Granted: Jun 22, 2004
Filed: Mar 15, 2002
Inventors
Munmaya K. Mishra
Raymond G. Saxton
Luis C. Salazar
Gary J. Spedale
Assignee (at issue)
Ethyl 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.