The USPTO sends email reminders ahead of maintenance filings. It also says, in terms, that failure to receive one does not excuse a missed deadline.
Those two facts sit together uncomfortably, and most firms have absorbed only the first.
What the reminder is
A courtesy. Not a statutory notice, not a guarantee, and not something the USPTO undertakes to deliver. It is sent to the correspondent of record on the file — an address set when the application was filed, which may have been a decade ago.
Four ways firms stop receiving them
- The attorney leaves. Their mailbox is closed and the reminders go with it.
- The client changes counsel and nobody updates the correspondence address on each registration.
- A merger or rebrand retires a domain, and mail to the old one bounces into nothing.
- Spam filtering. Bulk automated mail from a government domain, filtered once, filtered thereafter.
None of these announces itself. There is no bounce report anyone reads, no notification that notifications have stopped. The system continues to look exactly as it did when it was working.
Why it fails at the worst moment
The gap between maintenance filings is five to six years, then ten. That is longer than most people stay in a job and longer than most firms keep the same email infrastructure. The reminder that matters is sent to an address configured a very long time before it is needed.
And the deadline it covers is the one with no petition to revive.
What to do about it
Audit the correspondence address across the portfolio. Dull, takes an afternoon, occasionally finds a registration nobody has heard about in years.
Do not let it be the only notice. Reminders computed from the register do not depend on whether the USPTO's email reached an address somebody set in 2016.
Watch for silence. If reminders used to arrive and stopped, that is information — and it is the only signal this failure ever gives you.