High speed cure system
CA 1297623 C · Owner: Prendergast, John J. Sr. · Inventors: Rizk, Sidky D.; Prendergast, John J. Sr.; Hsieh, Harry W.S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture. The sealant comprises a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0 and, admixed therewith as a catalyst, from 0.2 to 1.75 percent by weight of the sealant, of dimorpholinodiethyl ether. This sealant is capable rapid cure with the addition of water. Although it is highly reactive in the presence of atmospheric moisture alone, it nevertheless has a good shelf stability in the absence of moisture.
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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.