Lapsed Sep 28, 2012 on the fee record · Medium confidence

Computed 20-year base term

Why Medium: A parent in the chain could not be resolved.

Second maintenance fee unpaid; grace period ended.

Held by Tetragenex Pharmaceuticals, Inc.

Filed Oct 17, 2003 as application 10/687,856 · Granted Sep 28, 2004

Base term, 20 years from filing

Today

Lapsed Sep 28, 2012

1999 2026

Clock starts
Aug 2, 1999

No longer in force
Sep 28, 2012

Granted
Sep 28, 2004

Term would have run to
Aug 2, 2019

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 3

Maintenance fees paid

Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.

Family applications on record here

Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

Its term would have run to Aug 2, 2019: its 20-year base term, with no adjustment for prosecution delay. Confidence: Medium. from the record

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 Aug 2, 1999, when application 09/365,561, the earliest non-provisional in its chain, was filed (this one was filed Oct 17, 2003); a parent in its chain could not be resolved (the next row)	Aug 2, 2019	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	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	1 of 3 maintenance fees paid	lapsed Sep 28, 2012	High confidence
Computed term end	The steps above, in order	Sep 28, 2012	Medium confidence

This family

US 6,613,991	Lapsed on the fee record Sep 2015	Sep 2015
US 7,005,589	Lapsed on the fee record Feb 2010	Feb 2010
Application 10/391,458	Abandoned not computed	not computed
US 6,797,897	this patent Sep 2012	Sep 2012
US 8,926,700	In force Feb 2029	Feb 2029
US 8,419,770	In force Dec 2031	Dec 2031
US 7,753,937	In force Aug 2027	Aug 2027
US 7,588,590	In force Mar 2027	Mar 2027

8 of 86 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.

Recorded	Assignor	Assignee	Conveyance
May 6, 2005 Reel 16522, frame 775	Innapharma, Inc.	Tetragenex Pharmaceuticals, Inc.	Merger

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.

Citations

later US patents cite this one

That is below the median of utility patents granted in 2004 in our data, the only group it is compared against. How we rank

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.

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