I remember when I saw a presentation by the macaroon authors a few years back, there were pending patents that Google filed around them. While the authors claimed Google wouldn't sue anyone, I'm always a bit skeptical about such claims. I thought macaroons would be helpful for some of my use-cases, but since I now knew there were patents that'd be wilful infringement so I didn't bother.
I can't find the patents now, so perhaps they were rejected or withdrawn. I had assumed that was why macaroons hadn't caught on more widely.
I can't find the patents now, so perhaps they were rejected or withdrawn. I had assumed that was why macaroons hadn't caught on more widely.
Edit: Found the patent: https://patents.google.com/patent/US9397990B1/