Deep immersion shrinkproofing of wool
CA 1087809 A · Owner: Kroy Unshrinkable Wools Limited · Inventors: Mains, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the invention disclosed herein wool sliver may be effectively shrinkproofed by immersing the sliver continuously into a bath of shrinkproofing solution to a depth of at least 1 metre if said sliver is carried down into said solution within 10° of vertical. According to the invention the most useful solution is an aqueous solution into which chlorine gas has been aspirated. An apparatus according to the invention comprises a substantially U-shaped bath having a depth exceeding 1 metre and equipped with means to convey wool sliver into said bath within 10° of vertical.
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 October 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 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.