Spring balance assembly
CA 2399662 A1 · Owner: Ashland Products, Inc. · Inventors: Murphy, Mark V.; Prete, James G.; Polowinczak, Allen D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a spring balance assembly for use with a sash window. The spring balance assembly comprises a plate clip, pivot brake , assembly, and, first and second coil springs. The plate has a first portion second portion, and a, generally perpendicular transition portion thereby defining a cavity proximate the first, portion. The cavity accommodates hardware mounted to the sash window during sliding, movement of the sash window. The first coil spring is rotatably supported on a first, spool and the second coil spring is rotatably supported on a second spool. A lower end, of the first spring is connected to an attaching element of the clip. A lower end of the, …
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 August 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 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.