Method for producing hexagonal boron nitride single crystal and hexagonal boron nitride single crystal
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United States of America Patent
Stats
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Oct 19, 2010
Grant Date -
Jan 17, 2008
app pub date -
Aug 13, 2007
filing date -
Feb 16, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of growing hexagonal boron nitride single crystal is provided. Hexagonal boron nitride single crystal is grown in calcium nitride flux by heating, or heating and then slowly cooling, boron nitride and a calcium series material in an atmosphere containing nitrogen. Bulk hexagonal boron nitride single crystal can thereby successfully be grown.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
NGK INSULATORS LTD | NAGOYA CITY AICHI PREF 467-8530 | |
MORI YUSUKE | 8-16-9 KISAICHI KATANO-SHI OSAKA 576-0033 |
International Classification(s)

- 2007 Application Filing Year
- C30B Class
- 274 Applications Filed
- 185 Patents Issued To-Date
- 67.52 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Imai, Katsuhiro | Nagoya, JP | 89 | 314 |
# of filed Patents : 89 Total Citations : 314 | |||
Isobe, Hiroaki | Taki-Gun, JP | 18 | 85 |
# of filed Patents : 18 Total Citations : 85 | |||
Iwai, Makoto | Kasugai, JP | 118 | 504 |
# of filed Patents : 118 Total Citations : 504 | |||
Kawahara, Minoru | Saitama, JP | 45 | 371 |
# of filed Patents : 45 Total Citations : 371 | |||
Kawamura, Fumio | Minoh, JP | 87 | 965 |
# of filed Patents : 87 Total Citations : 965 | |||
Sasaki, Takatomo | Minoh, JP | 64 | 492 |
# of filed Patents : 64 Total Citations : 492 |
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Patent Citation Ranking
- 3 Citation Count
- C30B Class
- 7.81 % this patent is cited more than
- 15 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Dec 21, 2020 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Dec 21, 2020 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Nov 13, 2020 | FP | EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Nov 13, 2020 |
Jul 06, 2020 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
May 09, 2016 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Nov 13, 2012 | I | Issuance | |
Oct 24, 2012 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Oct 01, 2009 | P | Published | |
Mar 30, 2009 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TREMEL, CHRISTOPHER J.;MORLOCK, BRIAN M.;SCHMITZ, MICHAEL J.;REEL/FRAME:022559/0931 Owner name: PACKET DIGITAL, NORTH DAKOTA Effective Date: Mar 30, 2009 |
Mar 26, 2009 | F | Filing | |
Mar 28, 2008 | PD | Priority Date |

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