Expiration date

[weird-rash]

I'm new here so I apologize in advance if I'm deviating from any normal protocol.

I've been exploring the public data sets provided by Google and USPTO and can't find an API that enables me to access the expiration dates of all US patents. I have a scraping tool that enables me to scrape all patents into a database and then filter on the expiration data field by ascend/descend. That tool doesn't meet my ongoing needs, however, due to 1) time it takes to scrape all the data and 2) it doesn't account for updates to data.

Has anybody had luck pulling expiration dates from any of the data sets?

[alekssadowski95]

@weird-rash I there even that kind of data? How would you know when the expiration date is?

[wetherbeei]

Expiration date is a "value added" field that doesn't come from the patent offices, and it is not available in our public datasets or any public bulk dataset I am aware of. The expiration dates we show on Google Patents are calculated by IFI CLAIMS, and they have a commercial BigQuery dataset available with this information.