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.
Step-in Height: This can also vary between models, and also between companies. Some baths require the bather to step up more than 7 inches to enter the bathtub, which can be quite high. There are models that only have a step in height of 2 inches, making access much easier! Door Closure: There are several closure systems for walk in bathtubs.