Improved slant coil spring and seal
CA 2215706 C · Owner: Miller, Timothy Frederick · Inventors: Miller, Timothy Frederick; Goldstein, Clifford W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coil spring (30) including a plurality of coils connected to one another in series. Each of the coils has a front portion (34) and a rear portion (36). The front portion of at least one of the coils includes a first section (34m) disposed at a first predetermined angle relative to a plane perpendicular to the spring centerline and a second section (34t) disposed at a second predetermined angle relative to the spring centerline. The coil spring is suitable for use in a variety of applications including but not limited to, seals.
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 27, 1996 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2018.
- 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.