Electrostatically produced structures and methods of manufacturing thereof
CA 1297147 C · Owner: University Of Liverpool (The) · Inventors: Berry, John Phillip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In apparatus comprising needles (10) a mandrel (11), and electrostatically charged plates (12 13, 14 and 15), variation of the electrostatic potential on the mandrel (11) and the plates (12, 13, 14 and 15) produces variation of the fibrous structure produced. In general where the mandrel (11) is significantly more attractive to the fibres, a microstructure of fibres of substantially uniform diameter is produced these fibres, being generally randomly orientated. Where the voltages on the mandrel (11) and on the plates (13 and 15) are varied to lessen the attraction of the mandrel (11) relative to the plates (13, 15) the fibrous structure is varied to produce fibres of a larger diameter than …
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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 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- 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.