Inertization system for highwall mining
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 7, 1999
Issued Date -
N/A
app pub date -
Oct 9, 1998
filing date -
Jul 12, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A highwall mining system for mining aggregate material from a seam (8) includes a mining device (9) for cutting aggregate material from the seam (8) thereby to form a drive (10) in the seam (8), a conveying device (11) for conveying mined aggregate material from the drive (10), and a circulation device located on or in the region of the mining device (9) for circulating the atmosphere at least at the forward end of the drive (10). The system further includes an inertization device (60, 61, 63, 71) for maintaining the concentration of oxygen in the atmosphere in the drive (10) lower than the concentration of oxygen required for explosion of methane gas and/or dusts and/or other flammable materials in the drive (10).
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 | |
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THE BROKEN HILL PROPRIETARY COMPANY LIMITED | MELBOURNE VIC 3000 |
International Classification(s)

- 1998 Application Filing Year
- E21F Class
- 17 Applications Filed
- 7 Patents Issued To-Date
- 41.18 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Marshall, Gordon Alexander | Camberwell, AU | 2 | 8 |
# of filed Patents : 2 Total Citations : 8 | |||
Rigby, Geoffrey Raymond | Charlestown, AU | 2 | 8 |
# of filed Patents : 2 Total Citations : 8 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 6 Citation Count
- E21F Class
- 14.29 % this patent is cited more than
- 26 Age
Forward Cite Landscape
- No Forward Cites to Display

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

Legal Events
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Aug 19, 2019 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Aug 19, 2019 | 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 |
Jul 14, 2019 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Jul 14, 2019 |
Mar 04, 2019 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Jul 14, 2015 | I | Issuance | |
Jun 24, 2015 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Nov 02, 2014 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
May 01, 2008 | P | Published | |
Apr 04, 2007 | F | Filing | |
Apr 03, 2007 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOI, SEONG JAE;CHOI, JAE YOUNG;JANG, EUN JOO;AND OTHERS;REEL/FRAME:019114/0602 Owner name: SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATION, KOR Effective Date: Apr 03, 2007 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOI, SEONG JAE;CHOI, JAE YOUNG;JANG, EUN JOO;AND OTHERS;REEL/FRAME:019114/0602 Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Effective Date: Apr 03, 2007 |
Oct 30, 2006 | PD | Priority Date |

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