Term ends May 8, 2028 · Low confidence
20-year base term ends Jan 8, 2028
Filed Mar 8, 2017 as application 15/453,823 · Granted Jan 29, 2019
Base term plus 121 days of patent term adjustment (USPTO delay)
Today
2008
2028
Clock starts
Jan 8, 2008
Jan 8, 2008
Term ends
May 8, 2028
May 8, 2028
Granted
Jan 29, 2019
Jan 29, 2019
base term
patent term adjustment
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
121
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,616,108, to May 8, 2028. The term already ends on or before that date, so the cap shortened nothing.
2 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.
8
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 121 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 2 maintenance fees are paid so far. Confidence: Low. from the record
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 Jan 8, 2008, when application PCT/US2008/000281, the earliest non-provisional in its chain, was filed (this one was filed Mar 8, 2017); a parent in its chain could not be resolved (the next row) | Jan 8, 2028 | 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 | +121 days, USPTO patent term adjustment record | May 8, 2028 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,616,108) | resolves to May 8, 2028, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | In force | High confidence |
| Further caveats on record | The record names parents not resolved: PCTUS2008000281, PCTUS2008000281 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | May 8, 2028 | Low confidence |
This family
| Application PCT/US2008/000281 | PCT application no patent term | no patent term |
| US 9,616,108 | In force Mar 2030 | Mar 2030 |
| US 9,821,031 | In force Apr 2030 | Apr 2030 |
| US 10,188,702 | this patent May 2028 | May 2028 |
| US 10,987,407 | In force Mar 2028 | Mar 2028 |
| Application 17/105,484 | Abandoned not computed | not computed |
| Application 18/168,570 | Abandoned not computed | not computed |
| Application 19/072,934 | Pending not computed | not computed |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 5, 2018 Reel 47085, frame 165 | De Leon-crutchlow, Diva; Stanley, Charles | The Children's Hospital of Philadelphia | Assignment of Assignor's Interest |
| Oct 23, 2018 Reel 47277, frame 722 | Stoffers, Doris | The Trustees of the University of Pennsylvania | Assignment of Assignor's Interest |
| Dec 14, 2022 Reel 62086, frame 17 | Children's Hospital of Philadelphia | National Institutes of Health (Nih), U.S. Dept. of Health and Human Services (DHHS), U.S. Government | Confirmatory License |
| Jan 30, 2024 Reel 66286, frame 229 | Children's Hospital of Philadelphia | National Institutes of Health (Nih), U.S. Dept. of Health and Human Services (DHHS), U.S. Government | Confirmatory License |
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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2028
Term ends May 8, 2028. No further fees fall due before then
Note
The 121 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,616,108, ends no earlier than this term, so it caps nothing.
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2019 in our data, the only group it is compared against.
How we rank
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.