Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 26, 2008
Grant Date -
Aug 31, 2006
app pub date -
Dec 11, 2003
filing date -
Dec 16, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A longwall support control for controlling the movements of longwall support units in the longwall of a mine that includes a central control system and a plurality of control units, of which a separate control unit (mining shield control device) is locally and operationally associated to each longwall support unit. Each mining shield control device comprises a switching element, which permits separating the bus line or lines in the mining shield control device. The mining control devices may also include signal amplifiers. An identical second bus line (parallel bus) permits retransmitting to the adjacent mining shield control device, incoming signals that do not store a code word assigned to the respectively addressed mining shield control device.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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TIEFENBACH CONTROL SYSTEMS GMBH | ROMBACHER HÜTTE 18A BOCHUM 44795 |
International Classification(s)

- 2003 Application Filing Year
- E21D Class
- 58 Applications Filed
- 12 Patents Issued To-Date
- 20.69 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Kellermann, Christian | Erlangen, DE | 24 | 59 |
# of filed Patents : 24 Total Citations : 59 | |||
Kellermann, Holger | Erlangen, DE | 2 | 2 |
# of filed Patents : 2 Total Citations : 2 | |||
Kellermann, Ursula | Erlangen, DE | 2 | 2 |
# of filed Patents : 2 Total Citations : 2 |
Cited Art Landscape
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Patent Citation Ranking
- 1 Citation Count
- E21D Class
- 2.33 % this patent is cited more than
- 17 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
Date | Code | Event | Description |
---|---|---|---|
Sep 26, 2016 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Aug 26, 2016 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Aug 26, 2016 |
Aug 26, 2016 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Apr 08, 2016 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Feb 22, 2012 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Aug 26, 2008 | I | Issuance | |
Aug 31, 2006 | P | Published | |
Jan 09, 2006 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KELLERMANN, URSULA;KELLERMANN, CHRISTIAN;KELLERMANN, HOLGER;REEL/FRAME:018551/0863 Owner name: TIEFENBACH CONTROL SYSTEMS GMBH, GERMANY Effective Date: Jan 09, 2006 |
Dec 11, 2003 | F | Filing | |
Dec 16, 2002 | PD | Priority Date |

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