Term ends Jan 20, 2029 · High confidence
20-year base term ends Jun 26, 2028
Filed Jun 26, 2008 as application 12/215,450 · Granted Dec 18, 2012
Base term plus 208 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Jun 26, 2008
Jun 26, 2008
Term ends
Jan 20, 2029
Jan 20, 2029
Granted
Dec 18, 2012
Dec 18, 2012
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
208
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
This patent's term runs 208 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. 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 Jun 26, 2008, when this application, 12/215,450, was filed | Jun 26, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +208 days, USPTO patent term adjustment record | Jan 20, 2029 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | 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 | Jan 20, 2029 | High confidence |
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 24, 2008 Reel 21736, frame 498 | Guo, Hongyan; Kim, Choung U.; Lee, Ill Y.; Mitchell, Michael L.; Rhodes, Gerry; Son, Jong C.; Xu, Lianhong | Gilead Sciences, Inc. | Assignment of Assignor's Interest |
| Dec 7, 2009 Reel 23612, frame 303 | Guo, Hongyan; Kim, Choung U.; Lee, Ill Y.; Mitchell, Michael L.; Rhodes, Gerry; Son, Jong C.; Xu, Lianhong | Gilead Sciences, Inc.; Korea Research Institute of Chemical Technology | Corrective Assignment to Correct the Assignee Previously Recorded on Reel 021736 Frame 0498. Assignor(S) Hereby Confirms the Assignment. |
| Dec 7, 2009 reel/frame not recorded | Guo, Hongyan; Kim, Choung U.; Xu, Lianhong; Rhodes, Gerry; Lee, Ill Y.; Son, Jong C.; Mitchell, Michael L. | Gilead Sciences, Inc. | Corrective Assignment to Correct the Assignee Previously Recorded on Reel 021736 Frame 0498. Assignor(S) Hereby Confirms the Assignment. |
| Dec 7, 2009 reel/frame not recorded | Guo, Hongyan; Kim, Choung U.; Xu, Lianhong; Rhodes, Gerry; Lee, Ill Y.; Son, Jong C.; Mitchell, Michael L. | Korea Research Institute of Chemical Technology | Corrective Assignment to Correct the Assignee Previously Recorded on Reel 021736 Frame 0498. Assignor(S) Hereby Confirms the Assignment. |
| Dec 8, 2009 Reel 23618, frame 87 | Gilead Sciences, Inc. | Korea Research Institute of Chemical Technology | Assignment of Assignor's Interest |
| Jul 3, 2012 Reel 28497, frame 743 | Gilead Sciences, Inc. | Korea Research Institute of Chemical Technology | Corrective Assignment to Correct the Receiving Party Data of the Assignment Previously Recorded on Reel 023618 Frame 0087. Assignor(S) Hereby Confirms the Assignment of Assignor's Interest. |
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
Jan 2029
Term ends Jan 20, 2029. No further fees fall due before then
Note
The 208 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
later US patents cite this one
That is above the median of utility patents granted in 2012 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.