19-Nor-steroids

US 6,790,971 Lapsed on the fee record

Lapsed Sep 14, 2008 on the fee record · From the USPTO record

Computed 20-year base term

First maintenance fee unpaid; grace period ended.

Filed May 17, 1995 as application 08/442,957 · Granted Sep 14, 2004

Base term, 17 years from grant or 20 from filing, whichever is later, plus 1826 days of patent term adjustment (USPTO delay)

Today

Lapsed Sep 14, 2008

1990 2026

Clock starts
Feb 23, 1990

No longer in force
Sep 14, 2008

Granted
Sep 14, 2004

Term would have run to
Sep 14, 2026

base term patent term adjustment after the term ends 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

1,826

Days of term adjustment

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

None

Terminal disclaimer

No disclaimer on this record.

0 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.

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, the 1995 transition rule	Granted Sep 14, 2004 + 17 years, or clock starts Feb 23, 1990 + 20 years, whichever is later; a parent in its chain could not be resolved (the next row)	Sep 14, 2021	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	+1826 days, USPTO patent term adjustment record	Sep 14, 2026	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	0 of 3 maintenance fees paid	lapsed Sep 14, 2008	High confidence
Computed term end	The steps above, in order	Sep 14, 2008	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.

19-Nor-steroids

Lapsed Sep 14, 2008 on the fee record · From the USPTO record

20-year base term ended Sep 14, 2021

How we calculated this date

Sources