Stack Comprising Multi-Folded Four Panel Sheets and Folding Boards Therefor

US 8,097,326 Lapsed on the fee record

Overview Sources & methods

Lapsed Jan 17, 2024 on the fee record · High confidence

Computed 20-year base term

Third maintenance fee unpaid; grace period ended.

Held by BW Converting, Inc.

Filed Oct 27, 2008 as application 12/258,639 · Granted Jan 17, 2012

Base term, 20 years from filing, plus 452 days of patent term adjustment (USPTO delay)

Today

Lapsed Jan 17, 2024

2008 2030

Clock starts
Oct 27, 2008

No longer in force
Jan 17, 2024

Granted
Jan 17, 2012

Term would have run to
Jan 22, 2030

base term patent term adjustment after the term ends fee events 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

452

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 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, 20 years from filing	Clock starts Oct 27, 2008, when this application, 12/258,639, was filed	Oct 27, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+452 days, USPTO patent term adjustment record	Jan 22, 2030	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 3 maintenance fees paid	lapsed Jan 17, 2024	High confidence
Computed term end	The steps above, in order	Jan 17, 2024	High 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.

Stack Comprising Multi-Folded Four Panel Sheets and Folding Boards Therefor

Lapsed Jan 17, 2024 on the fee record · High confidence

20-year base term ends Oct 27, 2028

How we calculated this date

Sources