Near infrared polyethylene inspection system and method
CA 2001666 C · Owner: Stix, Marsha Spalding · Inventors: Stix, Marsha Spalding; Ortiz, Marcos German
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sample inspection arrangement incorporates a sample of natural polyethylene with an included defect or flaw, a light source, containing near infrared wavelengths and a video camera. Natural, polyethylene has relatively high spectral transmissivity for wavelengths in the band of near infrared wavelengths. The video camera collects data from a beam of the near infrared light which either reflects from or is transmitted directly through a portion of the natural polyethylene sample. Data is collected from both defect free portions of the polyethylene sample and portions of polyethylene sample including at least one defect. A visual image of the polyethylene sample and included defect is …
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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 27, 1989 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2011.
- 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.