Vinyl covered sound absorbing structure
CA 1212338 A · Owner: Armstrong World Industries, Inc. · Inventors: Haines, Charles, Jr.; Kent, Raymond C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The base structure of a fibrous material has on one face thereof a plurality of acoustical perforations. Positioned over this perforated face is a vinyl layer having a plurality of apertures therein the, apertures of the vinyl being in number much greater than the number of perforations in the base structure. The apertures in the vinyl sheet not all being in alignment with the perforations of the base structure but the, perforations of the base structure having a substantial number thereof in alignment with the apertures in the vinyl structure whereby an acoustical sound absorbing structure is formed.
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 October 7, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 2003.
- 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.