Eye Therapy System

US 8,992,516 Lapsed on the fee record

Overview Sources & methods

Lapsed Mar 31, 2019 on the fee record · High confidence

Computed 20-year base term

First maintenance fee unpaid; grace period ended.

Held by Avedro, Inc.

Filed Sep 10, 2007 as application 11/898,189 · Granted Mar 31, 2015

Base term, 20 years from filing, plus 547 days of patent term adjustment (USPTO delay)

Today

Lapsed Mar 31, 2019

2007 2029

Clock starts
Sep 10, 2007

No longer in force
Mar 31, 2019

Granted
Mar 31, 2015

Term would have run to
Mar 10, 2029

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

547

Days of term adjustment

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

None

Terminal disclaimer

No disclaimer on this record.

0 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 Sep 10, 2007, when this application, 11/898,189, was filed	Sep 10, 2027	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+547 days, USPTO patent term adjustment record	Mar 10, 2029	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	0 of 3 maintenance fees paid	lapsed Mar 31, 2019	High confidence
Computed term end	The steps above, in order	Mar 31, 2019	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.

Eye Therapy System

Lapsed Mar 31, 2019 on the fee record · High confidence

20-year base term ends Sep 10, 2027

How we calculated this date

Sources