Polymeric film with reduced surface friction
CA 1333058 C · Owner: Ouderkirk, Andrew J. · Inventors: Smith, Samuel; Ouderkirk, Andrew J.; Dunn, Douglas S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Semicrystalline polymers can have predetermined amounts of their surfaces rendered amorphous by irradiation. Further treatment of these polymer surfaces which have been so modified can produce surfaces with reduced coefficients of friction. More particularly, the invention provides a process for modifying the surface of a semicrystalline polymer which process comprises irradiating, at a fluence of from 3 to 25 mJ/cm2/pulse and a pulse width of from 10 nanoseconds to 100 microseconds at least, one surface of a semicrystalline polymer composition with radiation which is absorbed by said composition controlling the, intensity and fluence of said radiation exposure so that semicrystalline …
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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
- Granted November 15, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 15, 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.