The Research Institute for Iron, Steel and Other Metals of the Tohoku University
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jul 20, 1982 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 18 Total Citation Count
- Jul 21, 1978 Earliest Filing
- 6 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
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Recent Publications
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4340568 Super hard highly pure silicon nitrides and a process and apparatus for producing the sameExpiredJan 28, 80Jul 20, 82[C30B]
4312923 Super hard-highly pure silicon nitrides, and a process and apparatus for producing the sameExpiredFeb 11, 80Jan 26, 82[C30B]
4279689 Process for producing super hard-highly pure silicon nitridesExpiredJul 21, 78Jul 21, 81[C30B]
4224296 Super hard-highly pure silicon nitrides, and a process and apparatus for producing the sameExpiredJul 21, 78Sep 23, 80[C10B]
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