Term ends Nov 15, 2026 · High confidence
20-year base term ends Nov 15, 2026
Held by Sobi, Inc.
Filed Apr 4, 2012 as application 13/438,989 · Granted Apr 9, 2013
Base term, 20 years from filing
Today
2006
2026
Clock starts
Nov 15, 2006
Nov 15, 2006
Term ends
Nov 15, 2026
Nov 15, 2026
Granted
Apr 9, 2013
Apr 9, 2013
base term
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
None
Term adjustment
No prosecution delay on this record.
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 is its 20-year base term, with no adjustment for 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 Nov 15, 2006, when application PCT/SG2006/000352, the earliest non-provisional in its chain, was filed (this one was filed Apr 4, 2012) | Nov 15, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Nov 15, 2026 | 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 |
|---|---|---|---|
| Aug 22, 2012 Reel 28825, frame 706 | S*bio Pte Ltd. | Cell Therapeutics, Inc. | Assignment of Assignor's Interest |
| Jul 29, 2014 Reel 33430, frame 516 | Cell Therapeutics, Inc. | Cti Biopharma Corp. | Change of Name |
| Apr 21, 2023 Reel 63404, frame 988 | Blanchard, Stephanie; Lee, Cheng Hsia Angeline; Nagaraj, Harish Kumar Mysore; Poulsen, Anders; Sun, Eric T.; Tan, Yee Ling Evelyn; William, Anthony Deodaunia | S*bio Pte Ltd. | Assignment of Assignor's Interest |
| Oct 3, 2024 Reel 68782, frame 512 | Cti Biopharma Corp. | Sobi, Inc. | Merger |
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.
What's changing
Nov 2026
Term ends Nov 15, 2026. No further fees fall due before then
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.