P P PI don't know if this is the same Patricia Diane French or not - but timing seems to correlate, full name, and location are the same. If so, she was married.
newspapers.com, The Vancouver Sun, 6 Oct 70, pg 52
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Also noting distance between Vancouver and Calgary is significant, at 970kms (~ 600 miles).
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It would be nice to see what is contained in the petition that this legal notice references.
It would seem that a letter was mailed to her last known address, and this newspaper notice states that if no response is forthcoming the divorce proceedings could go forward.