Double-ended utility knife with two covers
CA 2259669 A1 · Owner: Butts, Robert · Inventors: Butts, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double-ended utility knife having a housing or handle including an elongated, generally rectangular base member with a first end a second , end, a front side, and a back side is disclosed. The front side of the base member has a front compartment and a cover and the back side has a back compartment with a cover where the covers are attached to the front and back sides, respectively. Each of the compartments and covers extends less than the total length of the base member and is located at opposite ends of the base member. Each cover is secured to the base member by its own screw so that only one cover need be removed in order to replace a blade. Blades extend from both ends of the housing …
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 February 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2021.
- 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.