Inkjet Nozzle Arrangement with Rectangular Plan Nozzle Chamber and Ink Ejection Paddle

US 7,934,803 Lapsed on the fee record

Overview Sources & methods

Lapsed May 3, 2015 on the fee record · Medium confidence

Computed 20-year base term

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

First maintenance fee unpaid; grace period ended.

Held by Memjet Technology Limited

Filed Jun 4, 2009 as application 12/478,712 · Granted May 3, 2011

Base term, 20 years from filing, plus 33 days of patent term adjustment (USPTO delay)

Today

Lapsed May 3, 2015

1998 2026

Clock starts
Jul 10, 1998

No longer in force
May 3, 2015

Granted
May 3, 2011

Term would have run to
Aug 12, 2018

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

Days of term adjustment

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

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 12,478,712, to Aug 12, 2018. The term already ends on or before that date, so the cap shortened nothing.

0 of 1

Maintenance fees paid

One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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 Jul 10, 1998, when the earliest non-provisional application in its chain was filed (this one was filed Jun 4, 2009); a parent in its chain could not be resolved (the next row)	Jul 10, 2018	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	+33 days, USPTO patent term adjustment record	Aug 12, 2018	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 12,478,712)	resolves to Aug 12, 2018, no earlier than this term, so no change	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	0 of 1 maintenance fees paid	lapsed May 3, 2015	High confidence
Computed term end	The steps above, in order	May 3, 2015	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.

Inkjet Nozzle Arrangement with Rectangular Plan Nozzle Chamber and Ink Ejection Paddle

Lapsed May 3, 2015 on the fee record · Medium confidence

20-year base term ended Jul 10, 2018

How we calculated this date

Sources