Well, I am the 'boss' plus I work for a company that's very flexible so I don't have this problem of taking a shot 'on company time'. Unless you're working in a position where doing 'your thing' for a few minutes is disruptive, I would think most 'supervisors' would be pretty flexible on this if you asked. Then again, I have met quite a few anal people in my life....
As for the copyright, I see you are in Canada, so it depends on why you took the picture. Plus did you use the company's equipment? Copyright laws in Canada are vastly different than in the US.
When I worked for a large corporation in Canada, all my pics that I took for the company were copyrighted and licensed by the company. When I was contracted to do some images for a Canadian subsidiary, it was the same thing. Since I was commissioned to take the photographs for that company, they owned the copyright and usage rights.
So the bottom line is it depends who paid for them.