High Energy Density Redox Flow Device

US 11,342,567 In force

Overview Sources & methods

Term ends Oct 16, 2029 · High confidence

Computed 20-year base term

Held by Massachusetts Institute of Technology

Filed Jan 18, 2019 as application 16/252,088 · Granted May 24, 2022

Base term plus 126 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Oct 16, 2029

2009 2029

Clock starts
Jun 12, 2009

Term ends
Oct 16, 2029

Granted
May 24, 2022

base term patent term adjustment 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

126

Days of term adjustment

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

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 9,614,231, to Oct 16, 2029. The term already ends on or before that date, so the cap shortened nothing.

1 of 1

Maintenance fees paid

One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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 Jun 12, 2009, when the earliest non-provisional application in its chain was filed (this one was filed Jan 18, 2019)	Jun 12, 2029	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+126 days, USPTO patent term adjustment record	Oct 16, 2029	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 9,614,231)	resolves to Oct 16, 2029, no earlier than this term, so no change	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 1 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Oct 16, 2029	High 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.

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

High Energy Density Redox Flow Device

Term ends Oct 16, 2029 · High confidence

20-year base term ends Jun 12, 2029

How we calculated this date

Sources