Sealing of pipe liners
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
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Mar 18, 2025
Grant Date -
Jun 16, 2022
app pub date -
Mar 19, 2020
filing date -
Mar 19, 2020
priority date (Note) -
In Force
status (Latency Note)
Importance
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US Family Size
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Non-US Coverage
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Abstract
The present invention provides a method and apparatus of manufacturing a pipe liner for lining the inside of a pipe, for example a water or sewerage pipe requiring repair. The pipe liner is mainly formed of a fabric sleeve, or a plurality of fabric sleeves, and comprises a fluid-proof barrier coating on the inside surface of the pipe liner. The method involves arranging a strip of carrier material comprising a liquid sealant inside the fabric sleeve of the pipe liner and in registration with two opposing side edges of the sheet of fabric, facing an inner barrier coating of the fabric sleeve. The method can advantageously provide such a pipe liner with an inner barrier coating without everting the pipe liner after manufacture. The present invention may provide for avoiding internal cross-welding of pipe liners and a method for testing the integrity of the barrier coating of pipe liners.
First Claim
Other Claims data not available
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International Classification(s)
- 2020 Application Filing Year
- D06H Class
- 12 Applications Filed
- 6 Patents Issued To-Date
- 50 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- D06H Class
- 0 % this patent is cited more than
- < 1 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Sep 18, 2028 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 18, 2032 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 18, 2036 |