Eraser system for stubborn dry erase marks
CA 2127143 C · Owner: Sanford Corporation · Inventors: Wagner, Michael J.; Baudino, Rodney J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combined eraser and marker product which comprise an eraser system especially adapted for erasing stubborn dry erase marks on white boards having a first erasing medium for removing recently applied markings, such as a pile fabric and a second erasing, medium for removing stubborn dry erase marks such as velcro, the, eraser further having storage capacity for up to three markers.
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 June 30, 1994 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2016.
- 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.