Ultrasonic sensors for on-line monitoring of castings and molding processes at elevated temperatures
CA 2187957 C · Owner: Loong, Chee Ang · Inventors: Jen, Cheng-Kuei; Wang, Hao; Nguyen, Ky Thanh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ultrasonic sensors and associated methods for on-line monitoring of material properties for die casting molding and extrusion processes at elevated temperatures are disclosed. The sensors include the use of ultrasonic waveguides embedded in the processing machines and piezoelectric ultrasonic transducers. The sensors are operated in the reflection geometry m which one side access of the processing machines is required. The monitoring parameters are the flow front gap development and temperature of the materials being processed and filled in the cavities of the die in casting processes and the mold in injection molding and the temperature and viscosity of the molten polymers in the polymer …
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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 October 16, 1996 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2018.
- 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.