Chitosan Derivatives, Compositions and Related Methods of Use
US 8,916,542 In forceTerm ends Aug 23, 2030 · High confidence
20-year base term ends Nov 12, 2029
Nov 12, 2009
Aug 23, 2030
Dec 23, 2014
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Nov 12, 2009, when this application, 12/617,716, was filed | Nov 12, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +284 days, USPTO patent term adjustment record | Aug 23, 2030 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,012,429) | resolves to Aug 23, 2030, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 23, 2030 | 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.