Heat insulating multiple glazing and vacuum multiple glazing
CA 2237187 A1 · Owner: Misonou, Masao · Inventors: Katoh, Hidemi; Misonou, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Conventional insulating double-glazing unit and vacuum double-gazing unit do not have sufficient insulating property and the thickness of an insulating/double-glazing unit must be increased to improve the insulating property. The insulating/double-glazing unit according to this invention includes a first vacuum double-glazing unit (2) equipped with two sheets of flat glass (3 and 4) whose peripheries are sealed which have multi-layered , spacers (5) sandwiched between them and whose intermediate part is rendered vacuum, and a second vacuum double-glazing unit (2) or ordinary flat glass (10) whose periphery is sealed by a sealant (12) and which is laminated on the first vacuum …
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 September 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2019.
- 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.