Keratome with suspended stabilized blade, improved suction ring with applanator and guided engagement with keratome cutter head, automated translation of the cutter head, and blade insertion tool

US 6,610,075 Lapsed on the fee record

Overview Sources & methods

Lapsed Aug 26, 2015 on the fee record · From the USPTO record

Computed 20-year base term

Third maintenance fee unpaid; grace period ended.

Named at grant Becton, Dickinson and Company · find this owner

Filed Nov 4, 1999 as application 09/434,838 · Granted Aug 26, 2003

Base term, 20 years from filing

Today

Lapsed Aug 26, 2015

1998 2026

Clock starts
Oct 23, 1998

No longer in force
Aug 26, 2015

Granted
Aug 26, 2003

Term would have run to
Oct 23, 2018

base term 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

None

Term adjustment

No prosecution delay on this record.

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 23, 1998, when the earliest non-provisional application in its chain was filed (this one was filed Nov 4, 1999); 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	None on file	no change	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 Aug 26, 2015	High confidence
Computed term end	The steps above, in order	Aug 26, 2015	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.

Keratome with suspended stabilized blade, improved suction ring with applanator and guided engagement with keratome cutter head, automated translation of the cutter head, and blade insertion tool

Lapsed Aug 26, 2015 on the fee record · From the USPTO record

20-year base term ended Oct 23, 2018

How we calculated this date

Sources