Promoted, Attrition Resistant, Silica Supported Precipitated Iron Catalyst

US 9,550,172 In force (reinstated)

Overview Sources & methods

Term ends Sep 10, 2028 · Medium confidence

Computed 20-year base term

Why Medium: USPTO's status says it expired for nonpayment, but the fee record reads in force, reinstated.

Held by Res USA, LLC

Filed Mar 30, 2015 as application 14/672,636 · Granted Jan 24, 2017

Base term, 20 years from filing

Today

20 years from filing

Term ends Sep 10, 2028

2008 2028

Clock starts
Sep 10, 2008

Term ends
Sep 10, 2028

Granted
Jan 24, 2017

base term Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.

0 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 Sep 10, 2008, when the earliest non-provisional application in its chain was filed (this one was filed Mar 30, 2015)	Sep 10, 2028	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
Fee events	USPTO's status says it expired for nonpayment, but the fee record reads in force, reinstated	In force (reinstated)	Medium confidence
Computed term end	The steps above, in order	Sep 10, 2028	Medium 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.

Promoted, Attrition Resistant, Silica Supported Precipitated Iron Catalyst

Term ends Sep 10, 2028 · Medium confidence

20-year base term ends Sep 10, 2028

How we calculated this date

Sources