Writing instrument
CA 2474381 A1 · Owner: Deluca, Donald A. · Inventors: O'Brien, Richard C.; Kent, Michael; Deluca, Donald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A writing instrument includes a barrel (30) having a channel (33) with an open end (22), and a writing element (40) disposed in the channel (33). The writing element (40) is movable between a retracted position and an extended position. At least a portion of the writing element (40) is resilient and may be resiliently deflected in a direction substantially transverse to the longitudinal axis of the writing instrument (40). The resilient deflection of the writing element (40) biases the writing element (40) to engage the channel (33) and to retain the writing element (40) in the extended position. The writing instrument includes an actuator member (50) mounted for non-linear …
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 January 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2025.
- 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.