Per Google Patents, the order of dates for patent DE19817372C1 appears incorrect.

Per the site, the patent expired on April 18th 1998 (Fee Related), but lists a grant date of Oct 7th, 1999.

Looking at the legal events listed on the page on Google Patents, a series of different dates show up:

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What's going on here? Is it nothing more than data import that got messed up?

1 Answer 1


The date shown on google patents on the right side next to the patent number where it says

date - number - status

is the application/filing/publication date for the number next to it, not the date of the status at the right side.

So the application was filed 1998 and is now deemed withdrawn/lapsed.

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