Fire Hydrant Operating Nut and Method for Lubricating the Operating Nut

US 10,099,079 Lapsed on the fee record

Overview Sources & methods

Lapsed Oct 16, 2026 on the fee record · Low confidence

Computed 20-year base term

Second maintenance fee unpaid; grace period ended. The USPTO has not yet posted the lapse.

Held by Sigelock Systems, LLC

Filed Jul 17, 2015 as application 14/802,698 · Granted Oct 16, 2018

Base term, 20 years from filing, plus 36 days of patent term adjustment (USPTO delay)

Today

Lapsed Oct 16, 2026

2010 2030

Clock starts
May 25, 2010

No longer in force
Oct 16, 2026

Granted
Oct 16, 2018

Term would have run to
Jun 30, 2030

base term patent term adjustment after the term ends fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

1 of 2

Maintenance fees paid

Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts May 25, 2010, when the earliest non-provisional application in its chain was filed (this one was filed Jul 17, 2015)	May 25, 2030	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+36 days, USPTO patent term adjustment record	Jun 30, 2030	High confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case"	lapsed Oct 16, 2026	Low confidence
Computed term end	The steps above, in order	Oct 16, 2026	Low confidence

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Fire Hydrant Operating Nut and Method for Lubricating the Operating Nut

Lapsed Oct 16, 2026 on the fee record · Low confidence

20-year base term ends May 25, 2030

How we calculated this date

Sources