Formation of wads of finely divided material
CA 1315079 C · Owner: Johnson & Johnson (Proprietary) Limited · Inventors: Levy, David George; Oatley, John Albert; Sharp, William Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an apparatus for the manufacture of a product comprising, in part or as a whole a wad of finely divided materials, which apparatus comprises a wad-forming station having a former with a plurality of apertures formed therein, a system adapted to supply a band of fluid-permeable material along one side of the former to close off that side of the apertures therein in a fluidpermeable manner, said former and band of fluid permeable material being positioned between a first side of the wad-forming station which is to be at a higher pressure than a second side which is to be at a lower pressure a, fluid inlet into the first side of the wad-forming station and positioned …
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 March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
- 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.