Placement of pipes in the ground
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 27, 1996
Grant Date -
N/A
app pub date -
Jun 30, 1994
filing date -
Oct 14, 1991
priority date (Note) -
Expired
status (Latency Note)
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Importance

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Abstract
The invention provides that an underground through borehole (28) is formed with a reaming tool (24). It is filled with a viscous fluid and as soon as possible after being so filled, a flexible lining tube (32) is inserted into the borehole (28) to keep the surface from collapsing until a rigid service pipe (12) has been pulled or pushed into the borehole.
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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INSITUFORM GROUP LIMITED | DOUGLAS ISLE OF MAN |
International Classification(s)

- 1994 Application Filing Year
- E21B Class
- 637 Applications Filed
- 342 Patents Issued To-Date
- 53.69 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Wood, deceased Eric | late of Castletown, GB4 | 7 | 184 |
# of filed Patents : 7 Total Citations : 184 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 5 Citation Count
- E21B Class
- 3.23 % this patent is cited more than
- 29 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 |
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Apr 28, 2015 | FPAY | FEE PAYMENT | year of fee payment: 12 |
May 18, 2011 | FPAY | FEE PAYMENT | year of fee payment: 8 |
May 18, 2007 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Nov 18, 2003 | I | Issuance | |
Oct 30, 2003 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Dec 19, 2002 | P | Published | |
Jul 15, 2002 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SMITH, LEONARD;DOUGHERTY, GREGORY B.;TOLSON, MICHAEL H.;AND OTHERS;REEL/FRAME:013130/0371 Owner name: UNIVERSAL PROPULSION COMPANY, INC., ARIZONA Effective Date: Jul 15, 2002 |
May 29, 2002 | F | Filing | |
May 31, 2001 | PD | Priority Date |

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