Ballistic-resistant article
CA 1198563 A · Owner: Allied Corporation · Inventors: Harpell, Gary A.; Prevorsek, Dusan C.; Palley, Igor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordNo Claude kit for weapons
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Abstract From the Canadian patent
Articles such as vests, helmets and structural elements containing a network of ultrahigh molecular weight, high strength, high modulus polyethylene or polypropylene fibers. The fibers, and especially polyethylene fibers of 15, 20, 25, 30 or more g/denier tenacity, and 300, 500, 1000, 1500 or more g/denier tensile modulus impart exceptional ballistic resistance to the articles in spite of the melting points e.g. 145-151°C, for the polyethylene fibers and 168-171°C for the polypropylene fibers, which are high for these polymers but, substantially lower than the 200°C or more melting point previously thought necessary for good ballistic resistance.
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.
Why it's free to use
- Granted December 31, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2002.
- 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.