As of August 28, 2015, no live official trademarks were found on USPTO.gov for the exact term
There is one live trademark on Ingot (jewelry).
However, both Ingot and Ingots are generic words referring to refined bars of precious metals, such as gold and silver; these terms cannot be trademarked for their dictionary or descriptive meanings.
Please consult with a trademark attorney or expert for information on how these terms may be used in commerce.
Domains Sold Separately.