Antique 3 Legged Vintage Metal Trivet raised on 3 legs Marked Pat. June Year?

Description

Antique 3 Legged Vintage Metal Trivet raised on 3 legs Marked Pat. June the 2 digit year is unreadable. You can see this in my last photo.
In used condition.  There is wear to the black paint. No cracks in the metal.
Possibly cast iron but I don't know how to tell for sure.
Measures 10-3/4" from the handle across to the opposite side.  Measures 7-3/4" across the side without the handle. Close to 3-1/4" tall when sitting upright.
Weighs 1 pound 8 ounces before being put into a sturdy box for shipping. This will be packaged very carefully for you.
Please view each of my 6 enlarged photos which show all sides for the best description.
Thank you for looking!