Part 1 Conducting Research. Understand what inventions or ideas are eligible for a patent. You can patent your idea if it's a process, a machine, an article of manufacture, a composition of matter, or an improvement of any of these.
Quick Answer. The standard size of a bathtub is 60 inches long, 32 inches wide and 18 inches tall. Standard-sized tubs are designed to fit into an alcove, surrounded by three walls. Alcove tubs are available in a wide variety of materials.
For this reason the joists under the bathtub may be reinforced especially in installations that utilize cast iron or whirlpool tubs. Tub Weight Bathtubs range in weight from about 60 or 70 pounds for a fiberglass tub up to 500 pounds for a cast iron whirlpool tub. Cast iron tubs are more durable with a longer lasting finish than fiberglass. Fiberglass feels warmer to the touch when you first add water and does not cool the water the way iron may.