Enhanced Sequencing by Hybridization Using Pools of Probes

US 7,582,431 Term ended

Overview Sources & methods

Term ended Mar 16, 2021 · Medium confidence

Computed 20-year base term

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

USPTO later recorded it as expired for non-payment on Oct 4, 2021.

Held by Callida Genomics, Inc.

Filed Nov 12, 2004 as application 10/987,549 · Granted Sep 1, 2009

Base term plus 435 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ended Mar 16, 2021

2000 2026

Clock starts
Jan 6, 2000

Term ended
Mar 16, 2021

Granted
Sep 1, 2009

base term patent term adjustment 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

435

Days of term adjustment

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

None

Terminal disclaimer

No disclaimer on this record.

2 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 Jan 6, 2000, when the earliest non-provisional application in its chain was filed (this one was filed Nov 12, 2004); a parent in its chain could not be resolved (the next row)	Jan 6, 2020	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	+435 days, USPTO patent term adjustment record	Mar 16, 2021	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	2 of 2 maintenance fees paid	term ended	High confidence
USPTO status record	Recorded as expired for non-payment on Oct 4, 2021, after the term ended	no change	High confidence
Computed term end	The steps above, in order	Mar 16, 2021	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.

Enhanced Sequencing by Hybridization Using Pools of Probes

Term ended Mar 16, 2021 · Medium confidence

20-year base term ended Jan 6, 2020

How we calculated this date

Sources