Synthesis of fatty alcohol esters of alpha-hydroxy carboxylic acids and their use as percutaneous absorption enhancers

US 8,936,922 Lapsed on the fee record

Overview Sources & methods

Lapsed Jan 20, 2023 on the fee record · From the USPTO record

Computed 20-year base term

Second maintenance fee unpaid; grace period ended.

Named at grant Chemsmart, LLC · find this owner

Filed Apr 11, 2012 as application 13/444,087 · Granted Jan 20, 2015

Base term, 20 years from filing

Today

Lapsed Jan 20, 2023

2005 2026

Clock starts
Oct 17, 2005

No longer in force
Jan 20, 2023

Granted
Jan 20, 2015

Term would have run to
Oct 17, 2025

base term 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

None

Term adjustment

No prosecution delay on this record.

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 Oct 17, 2005, when the earliest non-provisional application in its chain was filed (this one was filed Apr 11, 2012); a parent in its chain could not be resolved (the next row)	Oct 17, 2025	High confidence
Continuity chain	A parent in the chain could not be resolved	dated from this application's own claim	Medium confidence
Patent term adjustment	No term adjustment record on a grant after 2005, so none is added	no change	Medium confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 2 maintenance fees paid	lapsed Jan 20, 2023	High confidence
Computed term end	The steps above, in order	Jan 20, 2023	From the USPTO record

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.

Synthesis of fatty alcohol esters of alpha-hydroxy carboxylic acids and their use as percutaneous absorption enhancers

Lapsed Jan 20, 2023 on the fee record · From the USPTO record

20-year base term ended Oct 17, 2025

How we calculated this date

Sources