Doughnut Food Recipe Patent

Pre-1940s food patents at the best! They’re concise and get the job done without fanfare. In 1930, Alva Shroyer discovered the solution to greasy doughnuts 🍩 and simply patented:

“adding vinegar to doughnut dough”.

… to repel the grease in which doughnuts are fried.

Clear, short and effective.

Iptica – Easily file a provisional patent for only $99.