Method of Co-Expressing Galactosyltransferase and a Glycoprotein in a Transgenic Plant Cell and Sialylating the Glycoprotein for Production of Glycoprotein Having Human-Type Sugar Chain
US 9,574,218 Lapsed on the fee recordLapsed Feb 21, 2021 on the fee record · Medium confidence
20-year base term ended Jan 18, 2022
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,241,909, US 8,309,795), so the cap could be lower.
First maintenance fee unpaid; grace period ended.
Jan 18, 2002
Feb 21, 2021
Feb 21, 2017
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jan 18, 2002, when the earliest non-provisional application in its chain was filed (this one was filed Apr 14, 2014) | Jan 18, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +88 days, USPTO patent term adjustment record | Apr 16, 2022 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 6,998,267, US 8,241,909, US 8,309,795) | capped to Dec 8, 2019 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No maintenance fee can end the term early | lapsed Feb 21, 2021 | High confidence |
| Computed term end | The steps above, in order | Feb 21, 2021 | 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.