Methods of Controlling Proliferation and Differentiation of Stem and Progenitor Cells
US 7,855,075 Term endedTerm ended Feb 17, 2018 · Medium confidence
20-year base term ended Feb 17, 2018
Why Medium: A parent in the chain could not be resolved.
USPTO later recorded it as expired for non-payment on Jan 28, 2019.
Feb 17, 1998
Feb 17, 2018
Dec 21, 2010
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Feb 17, 1998, when the earliest non-provisional application in its chain was filed (this one was filed May 19, 2008); a parent in its chain could not be resolved (the next row) | Feb 17, 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 | Disclaimer resolved from the filed document (refs US 6,887,704) | resolves to Feb 17, 2018, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Jan 28, 2019, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Feb 17, 2018 | 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.