Granted Patent
Utility
US 6,074,935 · App. 08/882,057
Method of reducing the formation of watermarks on semiconductor wafers
Inventor:
Ravikumar Ramachandran
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Jun 25, 1997
Inventor
Ravikumar Ramachandran
Assignee (at issue)
Siemens Aktiengesellschaft
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.