Granted Patent
Utility
US 6,080,498 · App. 08/875,768
Permanent magnet for ultra-high vacuum and production process thereof
Inventors:
Fumiaki Kikui, Masako Ikegami, Kohshi Yosimura
Patented Case
View Patent ↗
Granted: Jun 27, 2000
Filed: Aug 5, 1997
Inventors
Fumiaki Kikui
Masako Ikegami
Kohshi Yosimura
Assignee (at issue)
Sumitomo Special Metals Co., Ltd.
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.