Retractable ink pen
CA 2349037 A1 · Owner: Lee, Rocky Jenlon · Inventors: Lee, Rocky Jenlon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
All tip retractable pens have no caps to cover their pen tips instead their , pen tips or tip protection covers are retractable such as mechanical ball pens twisted ball pens or , telescopic ball pens. Theirs pen tips will be same direction to theirs clips and always point to ground , either in writing or any time unused. Because theirs structure as retractable pen they don't need , caps. To make retractable pen be able to use liquid ink, this invention use spool valves inside the liquid ink cartridge, which also, applies on the pen tip is same direction with its pen clip or has no cap to cover its pen tip. Using an, air valve a pen tip valve, a valve rod, and a pushing or twist action to …
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 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.