Leaching system conduit
CA 1329959 C · Owner: Infiltrator Systems, Inc. · Inventors: Nichols, James Monroe; May, Randall Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances preferably rectanguloid, in shape. The combination of lips and protuberances prevent compaction of the earth against the sidewalls when the devices are buried without the use of stone fill. They permit the formation of a good biocrust layer and facilitate the exfiltration of liquid into the earth. 21
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 31, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.