Upholstered spring seat
CA 1100025 A · Owner: Kay Springs, Incorporated · Inventors: Krakauer, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seats are provided for a wide range of small chairs which are economically made comfortable throughout by the utilization of no more than two non-intersecting resilient strands positioned spanning an opening in the seat frame so as to pass beneath the heavily loaded bony protuberances in the buttocks, known as ischial tuberosities and sustain part, of the weight of the torso whilst permitting the thighs of the user to descent into and be partially supported by the seat frame. The average distance between the two tuberosities being 13.2 cm. the supporting points on the strand or strands are spaced apart by about that average distance.
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 April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.