HIRAI, TOSHIO
Patent Owner
Stats
- 1 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jul 04, 1995 most recent publication
Details
- 1 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 133 Total Citation Count
- Aug 31, 1981 Earliest Filing
- 4 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5173459 Si.sub.3 N.sub.4 -A1.sub.2 O.sub.3 composite sintered bodies and method of producing the sameExpiredJul 23, 90Dec 22, 92[C04B]
4772304 Transparent BN-type ceramic material and method of producing the sameExpiredMay 21, 86Sep 20, 88[C01B, C03B]
4469801 Titanium-containing silicon nitride film bodies and a method of producing the sameExpiredAug 31, 81Sep 04, 84[B32B]
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