Austenitic, non-magnetic, stainless steel alloy and articles made therefrom
CA 2079914 C · Owner: Dulmaine, Bradford A. · Inventors: Kosa, Theodore; Dulmaine, Bradford A.; Schlosser, Donald K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An austenitic, non-magnetic, stainless steel alloy is disclosed which, in the wrought condition is essentially, ferrite-free and has a relative magnetic permeability of less than about 1.02, a room temperature 0.2 % yield strength of at least about 100 ksi, and good resistance to stress corrosion cracking in chloride environments Broad, intermediate, and preferred ranges are disclosed in the table (I), the balance being iron. The alloy is balanced to be essentially ferrite-free and to provide goad chloride SCC resistance in accordance with the following relationships: w/o N ~ w/o Mn + w/o Cr-21.9/20; w/o Ni + 2(w/o Cu) ~ w/o Cr + w/o Mo-14.6/1.5; and w/o Mn < w/o Cr + w/o Mo.
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
- Filed April 11, 1991 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.