Sealing or insulating sheeting made of (polymer-)bitumen
CA 2402026 A1 · Owner: Unterreiter, Karl · Inventors: Unterreiter, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to sealing or insulating sheeting made of (polymer- )bitumen, especially for covering roofs and lining external cellar walls comprising at least one self-adhesive surface which is made of an adhesive material and which is provided at least over a portion of the surfaces of the sheeting. The or each self-adhesive surface is provided with a protective covering that can be peeled off. The inventive sheeting is characterized in that the protective covering (3) of at least one self-adhesive surface (2) is slit and/or perforated at one or more locations (4) and/or is provided in the form of several partially overlapping separation layer sheetings (3 3', 3'', 3'''), …
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 March 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.