Heat exchanger
CA 1076555 A · Owner: Imperial Chemical Industries Limited · Inventors: Brackman, Derek S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat exchanger of thermoplastics materials e.g. polypropylene, comprises two spaced-apart headers interconnected by an extruded board comprising a plurality of tubular passages extending from one end of the board to the other; each header having a longitudinal groove in its exterior surface and a plurality of holes spaced along the groove interconnecting the groove and the interior of the header; each end of the board being located along the groove of one of the headers and held in position by a sealing bead adhering to both the header and the board, the bead extending continuously right round the mouth of the groove where adjacent to the board, to seal against loss of any fluid flowing …
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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
- 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.