Manhole liner and method of using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
N/A
app pub date -
Jun 3, 2015
filing date -
Jul 12, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A manhole liner and a method of using the same are provided. The manhole liner is sized substantially equally to the largest diameter of the manhole, so that the liner does not have to stretch to be pressed against the manhole wall. Additionally, the liner is impregnated with a resinous material capable of curing and hardening. A bladder, preferably stretchable circumferentially and having a diameter less than the smallest diameter of the manhole, is inserted into the liner. The bladder is expanded to press the liner against the wall of the manhole to dispense resinous material from the liner, while the liner is able to fold over itself in areas having a diameter less than the original diameter of the liner. Because the bladder stretches to produce a smooth outside surface, the resinous material will migrate to areas in the folds and will cure with a smooth interior surface.
First Claim
Other Claims data not available
Family
International Classification(s)
- E21D:SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAM....
- B28B:SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG O....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- E04B:GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTIT....
- E02D:FOUNDATIONS; EXCAVATIONS; EMBANKMENTS
- E03F:SEWERS; CESSPOOLS
- 2015 Application Filing Year
- E21D Class
- 86 Applications Filed
- 67 Patents Issued To-Date
- 77.91 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E21D Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 17, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 17, 2030 |
