Spring element

US D809,375 In force

Overview Sources & methods

Term ends Feb 6, 2033 · From the USPTO record

No current holder resolved from the recorded chain.

Filed Jun 17, 2016 as application 29/568,378 · Granted Feb 6, 2018

Base term, 15 years from grant

Today

15 years from grant

Term ends Feb 6, 2033

2018 2033

Clock starts
Feb 6, 2018

Term ends
Feb 6, 2033

base term 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

None

Term adjustment

No prosecution delay on this record.

None

Terminal disclaimer

No disclaimer on this record.

15 years from grant

Base term

No maintenance fees are payable on this kind of patent.

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, 15 years from grant	Granted Feb 6, 2018	Feb 6, 2033	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	High confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Computed term end	The steps above, in order	Feb 6, 2033	From the USPTO record

Sources

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

USPTO account required: This application in Patent Center

No maintenance fees are payable on this kind of patent, so the record carries no fee events.

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.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.