Air-conditioner cleaning method and its cleaning apparatus
CA 2127598 C · Owner: Kitai, Taiko · Inventors: Kitai, Taiko; Sasaki, Katsuyuki; Karashima, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to cleaning method and cleaning apparatus of air-conditioner used in the operation for cleaning and removing the contamination of the heat exchanger (condenser, evaporator) for composing an air-conditioner for, example, one-package type air-conditioner and separate type air-conditioner, and more particularly to an air-conditioner cleaning method and its cleaning apparatus capable of securely cleaning and removing the dirt sticking to the heat exchanger to the deepest parts, by keeping the open side of the spraying guide body in contact with the cleaning parts of the heat exchanger for composing an air-conditioner connecting detergent feed means to the closed side of …
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 July 7, 1994 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2016.
- 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.