Method for Producing Retinal Tissue and Retina-Related Cells

US 11,473,056 In force

Overview Sources & methods

Term ends Aug 22, 2034 · Medium confidence

Computed 20-year base term

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

Held by Sumitomo Chemical Company, Limited and RIKEN

Filed Nov 22, 2019 as application 16/692,484 · Granted Oct 18, 2022

Base term, 20 years from filing

Today

20 years from filing

Term ends Aug 22, 2034

2014 2034

Clock starts
Aug 22, 2014

Term ends
Aug 22, 2034

Granted
Oct 18, 2022

base term 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.

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 10,501,724, to Aug 22, 2034. The term already ends on or before that date, so the cap shortened nothing.

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 Aug 22, 2014, when the earliest non-provisional application in its chain was filed (this one was filed Nov 22, 2019); a parent in its chain could not be resolved (the next row)	Aug 22, 2034	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	Disclaimer resolved from the filed document (refs US 10,501,724)	resolves to Aug 22, 2034, no earlier than this term, so no change	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 2 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Aug 22, 2034	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.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

Method for Producing Retinal Tissue and Retina-Related Cells

Term ends Aug 22, 2034 · Medium confidence

20-year base term ends Aug 22, 2034

How we calculated this date

Sources