Spool for thread
CA 1046475 A · Owner: Gutermann And Co. Aktiengesellschaft · Inventors: Rottleb, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A unitary moulding of plastics material comprising:- (a) a spool member for carrying thread windings and, (b) a thread trapping member joined to said spool member by frangible bridging means, said thread trapping member being adapted, after breaking of the frangible bridging means, to be fitted to the end of said spool member so that a surface of the thread trapping member cooperates with a surface of the spool member to form a groove for trapping thread.
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 January 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 1996.
- 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.