Fillerless writing instrument
CA 2269609 C · Owner: Bic Corporation · Inventors: Mcculloch, Russell; Hart, Frank; Chadwick, Barry W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A writing instrument (10) is disclosed having a barrel (12) defining an internal passage including an ink reservoir. A venting mechanism (20) is positioned at least partially within the internal passage of the barrel adjacent and anterior end portion thereof. The venting mechanism (20) includes an elongated body defining an axial bore therethrough in communication with the ink reservoir (24), and a plurality of spaced apart fins (32) peripherally surrounding the elongated body and defining a plurality of annular channels between the fins. Each of the fins defines a groove thereon to interconnect the annular channels. The writing instrument further includes a point support member …
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 October 21, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2019.
- 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.