Improved structure foldable assembly-type lamp shade
CA 2459534 A1 · Owner: Wu, Wen-Chang · Inventors: Wu, Wen-Chang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved structure foldable assembly-type lamp shade comprised of a top ring at the uppermost end of the lamp shade a bottom ring of larger, circumference than the top ring and frame members propped between the top ring, and the bottom ring. The bottom ring has fixing mounts consecutively disposed at, the frame member locations that provide for the assembly and positioning of the, frame members, with the fixing mounts at the support member installation locations having different type connection sections based on the respective type of, fixing mount arrangement utilized. When packaged since the frame members can, be first folded down and whorled into a flat state such that the frame …
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 April 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2023.
- 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.