Granted Patent
Utility
US 4,936,949 · App. 07/201,018
Czochraski process for growing crystals using double wall crucible
Inventors:
Michio Kida, Yoshiaki Arai, Kensho Sahira
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Jun 1, 1988
Inventors
Michio Kida
Yoshiaki Arai
Kensho Sahira
Assignee (at issue)
Mitsubishi Kinzoku Kabushiki Kaisha
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.