Sealant laminates
CA 1100401 A · Owner: Firestone Tire & Rubber Company (The) · Inventors: Bohm, Georg G. A.; Anderson, John N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This disclosure relates to a sealant laminate to be primarily used in pneumatic tires to seal punctures made by external objects, such as nails. The laminate of the invention comprises a puncture sealing layer and at least one other layer the puncture sealing layer containing a polymeric material that has been at least partially degraded by exposure to irradiation or to heat in the presence of a peroxide to yield its sealant properties; the degraded polymeric material is selected from the group consisting of polyisobutylene copolymers containing, polyisobutylene and polyethylene oxide. The laminate may be in sheet or strip form with various cross-sectional shapes. The layers in the laminate …
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
- Granted May 5, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 1998.
- 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.