I've never gotten a patent (thought of it once but never did) although many of my coworkers did. Back then I was reading about the process, and the preference was for proof of invention including notebooks written in ink, although one coworker with a patent said that she submitted her notes written in pencil.I made nothing on my ester lubricant patents. Two of them made millions for my company, but being that I was employed at the time, I had to sign them over to the company for $1. I never even got the $1!
I do recall reading about small bonuses for employees awarded a patent. Nothing huge - maybe $500 to $1200. And they would typically have a plaque made with the company name and a description of the patent.