Soft washing

Does anyone know if “soft wash” a trademarked term or is it just a generic phrase for doing a chemical clean that anyone can use in their marketing?

I once heard that someone had attempted to lay claim to softwash when used in conjunction with other words in a specific name.

Unless you are going to directly use that specific combination, I would not worry about it.

Google returned About 771,000 results (0.35 seconds) on softwash.

Apparently, more than one company or person uses the term.