Use of scent, specifically in vacuuming
CA 1330540 C · Owner: Polligkeit, Wolfgang · Inventors: Polligkeit, Wolfgang; Neugart, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Scent for air flowing through electrostatically charged filters has ingredients that are of a molecular weight between 100 and 300 and are either predominantly polar and aprotic or predominantly apolar and aprotic. Aprotic scents with a molecular weight between 100 and 300 are used for enrichment of air flowing through electrostatically charged filters of polypropylene, and apolar, aprotic scents with a molecular weight between 100 and 300 are used for enrichment of air flowing through electrostatically charged filters of polycarbonate.
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 July 5, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2011.
- 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.