Method and apparatus for the linear transport of materials in roll and sheet form
CA 2029183 A1 · Owner: E. I. Du Pont De Nemours And Company · Inventors: Fischer, Gerhard; Herden, Andreas; Herden, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method and apparatus for linear transport of sheet and web material by piezotranslators the, longitudinal displacement is measured by an optical interferometer and the interferometer output is utilized to control the longitudinally acting piezotranslators.
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 November 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2012.
- 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.