Lapsed Jul 16, 2023 on the fee record · High confidence
20-year base term ends Nov 20, 2034
First maintenance fee unpaid; grace period ended.
Filed May 22, 2016 as application 15/038,470 · Granted Jul 16, 2019
Base term, 20 years from filing, plus 11 days of patent term adjustment (USPTO delay)
Today
Lapsed Jul 16, 2023
2014
2034
Clock starts
Nov 20, 2014
Nov 20, 2014
No longer in force
Jul 16, 2023
Jul 16, 2023
Granted
Jul 16, 2019
Jul 16, 2019
Term would have run to
Dec 1, 2034
Dec 1, 2034
base term
after the term ends
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
11
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
32
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Dec 1, 2034: its 20-year base term plus 11 days of term adjustment for prosecution delay. 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 20, 2014, when application PCT/IB2014/003077, the earliest non-provisional in its chain, was filed (this one was filed May 22, 2016) | Nov 20, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +11 days, USPTO patent term adjustment record | Dec 1, 2034 | 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 | 0 of 3 maintenance fees paid | lapsed Jul 16, 2023 | High confidence |
| Computed term end | The steps above, in order | Jul 16, 2023 | High confidence |
This family
| Application PCT/US2014/071501 | PCT application no patent term | no patent term |
| Application PCT/US2015/064432 | PCT application no patent term | no patent term |
| US 10,351,536 | this patent Jul 2023 | Jul 2023 |
| US 9,751,889 | In force Nov 2034 | Nov 2034 |
| US 9,969,701 | Lapsed on the fee record May 2026 | May 2026 |
| US 10,273,262 | Lapsed on the fee record Apr 2023 | Apr 2023 |
| US 9,957,240 | In force Dec 2035 | Dec 2035 |
| US 10,246,437 | Lapsed on the fee record Apr 2023 | Apr 2023 |
8 of 32 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| May 24, 2019 reel/frame not recorded | Yang, Chaohui; Zhang, Xiaoyu; Li, Pixu; Wang, Peng; Zhang, Yanfeng; Chen, Minhua | Crystal Pharmatech Co., Ltd. | Assignment of Assignor's Interest |
| May 24, 2019 reel/frame not recorded | Yang, Chaohui; Zhang, Xiaoyu; Li, Pixu; Wang, Peng; Zhang, Yanfeng; Chen, Minhua | Suzhou Pengxu Pharmatech Co., Ltd. | Assignment of Assignor's Interest |
| May 24, 2019 Reel 49275, frame 742 | Chen, Minhua; Zhang, Yanfeng; Yang, Chaohui; Zhang, Xiaoyu; Wang, Peng; Li, Pixu | Crystal Pharmatech Co., Ltd.; Suzhou Pengxu Pharmatech Co., Ltd. | 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
Note
The 11 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites this one
That is below the median 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.