Rotary tubular headrail blind design
CA 2084539 A1 · Owner: Woodring, Cooper C. · Inventors: Gaber, Ira; Woodring, Cooper C.; Rapp, William H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary tubular headrail blind (10) comprising a tubular headrail (11) with plurality of suspending ladder sets (13) to support a plurality of horizontal slats (90) in parallel, a tubular foot rail (12) a, tilter (19) to rotate the tubular headrail (11) directly, a lifter (20) to raise the tubular foot rail (12) to any desired level, and a holder (56) with two ends to tie each ladder set's (13) inner and outer ladder tapes (15, 14) to maintain the inner and outer ladder tapes (15, 14) close and parallel with each other when the tubular headrail (11) is rotated so that all slats (90) are kept in a same tilting degree. Fig. 1
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 December 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2014.
- 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.