Yarn winding apparatus and process
CA 2004950 A1 · Owner: E. I. Du Pont De Nemours And Company · Inventors: Williamson, Thomad D.; Dickins, John S. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A string-up system and apparatus using a novel, dual-slotted traverse guide with preferential string up, of a first yarn in the one slot associated with transfer, means to move a yarn if desired, out of the first slot, so this yarn is strung up in the second slot.
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
- Filed December 8, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 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.