Basic suspension, its preparation and process for paper deacidification
CA 2473407 A1 · Owner: Giorgi, Rodorico · Inventors: Schettino, Claudius Vinicius; Dei, Luigi; Giorgi, Rodorico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Basic suspension wherein oxides, hydroxides carbonates, or their mixture, in , the form of particles having determined dimensions are suspended in the appropriated solvents, are described. Processes for the preparation of the above said suspensions and of the suspended particles are also described together with the uses of the suspensions in processes for paper deacidification and/or porous materials consolidation.
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 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2024.
- 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.