Keratome with Suspended Stabilized Blade, Applanator and Guided Engagement with Keratome Cutter Head

US 7,427,285 Lapsed on the fee record

Overview Sources & methods

Lapsed Sep 23, 2016 on the fee record · Low confidence

Computed 20-year base term

Second maintenance fee unpaid; grace period ended.

Held by Becton Dickinson Accutecare, Inc.

Filed Jun 6, 2006 as application 11/447,386 · Granted Sep 23, 2008

Base term, 20 years from filing, plus 36 days of patent term adjustment (USPTO delay)

Today

Lapsed Sep 23, 2016

1998 2026

Clock starts
Oct 23, 1998

No longer in force
Sep 23, 2016

Granted
Sep 23, 2008

Term would have run to
Nov 28, 2018

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

Days of term adjustment

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

Unresolved

Terminal disclaimer

On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.

1 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 Oct 23, 1998, when the earliest non-provisional application in its chain was filed (this one was filed Jun 6, 2006); a parent in its chain could not be resolved (the next row)	Oct 23, 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	+36 days, USPTO patent term adjustment record	Nov 28, 2018	High confidence
Terminal disclaimer cap	Disclaimer on file (approved), reference document not resolved	no cap applied, and none guessed	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 2 maintenance fees paid	lapsed Sep 23, 2016	High confidence
Computed term end	The steps above, in order	Sep 23, 2016	Low 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.

Keratome with Suspended Stabilized Blade, Applanator and Guided Engagement with Keratome Cutter Head

Lapsed Sep 23, 2016 on the fee record · Low confidence

20-year base term ended Oct 23, 2018

How we calculated this date

Sources