Dually Derivatized Chitosan Nanoparticles and Methods of Making and Using the Same for Gene Transfer in Vivo

US 11,167,045 In force

Overview Sources & methods

Term ends Sep 25, 2034 · High confidence

Computed 20-year base term

Held by Engene, Inc.

Filed Oct 28, 2019 as application 16/666,314 · Granted Nov 9, 2021

Base term, 20 years from filing

Today

20 years from filing

Term ends Sep 25, 2034

2014 2034

Clock starts
Sep 25, 2014

Term ends
Sep 25, 2034

Granted
Nov 9, 2021

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 10,046,066, US 10,456,481, to Sep 25, 2034. The term already ends on or before that date, so the cap shortened nothing.

1 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 25, 2014, when the earliest non-provisional application in its chain was filed (this one was filed Oct 28, 2019)	Sep 25, 2034	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 10,046,066, US 10,456,481)	resolves to Sep 25, 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 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Sep 25, 2034	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.

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

Dually Derivatized Chitosan Nanoparticles and Methods of Making and Using the Same for Gene Transfer in Vivo

Term ends Sep 25, 2034 · High confidence

20-year base term ends Sep 25, 2034

How we calculated this date

Sources