Tissue impulse drying
CA 2409350 A1 · Owner: Hsu, Jay C. · Inventors: Kaufman, Kenneth; Chuang, Strong C.; Hsu, Jay C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing tissue webs is disclosed. More particularly the , present invention is directed to an improved process for drying webs. According to the present invention, a formed web still containing a substantial amount of moisture is passed through a nip formed between a press roll (43) and a heated drum (46). When passed through the nip the web is , placed on a porous fabric (40). The web is then carried through the nip for a period of time and subjected to temperatures and pressures sufficient to create a steam front which travels through the web and expels a significant amount of moisture from the web through the porous fabric.
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 May 11, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2023.
- 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.