User friendly crack-filling system and method for filling cracks with foamable polyurethane prepolymer
CA 2361468 A1 · Owner: Braun, Robert · Inventors: Schutter, Deborah; Braun, Robert; Dobrez-Florez, Diana
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for filling cracks (90) in concrete surfaces (92) using a onecomponent, hydrophilic polyurethane prepolymer without the addition of any granular impregnating agents is disclosed. The prepolymer is provided in a hand-held aerosol container (60, 200) and is injected into the cracks (90) through hollow injection ports (56) that are adhered (52) in place on the surfaces (92) over the cracks (90) and subsequently closed off (57 58, 80) , when filled. The crack (90) is filled from the bottom up (56) to prevent the formation of air pockets in the crack (90).
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 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2022.
- 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.