Term ends May 11, 2035 · High confidence
20-year base term ends Mar 27, 2035
Held by Headway Technologies, Inc.
Filed Mar 27, 2015 as application 14/670,596 · Granted Mar 28, 2017
Base term plus 45 days of patent term adjustment (USPTO delay)
Today
2015
2035
Clock starts
Mar 27, 2015
Mar 27, 2015
Term ends
May 11, 2035
May 11, 2035
Granted
Mar 28, 2017
Mar 28, 2017
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
45
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
28
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 45 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Mar 27, 2015, when this application, 14/670,596, was filed | Mar 27, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +45 days, USPTO patent term adjustment record | May 11, 2035 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 11, 2035 | High confidence |
This family
| US 9,437,225 | In force Dec 2034 | Dec 2034 |
| US 8,947,986 | In force Sep 2034 | Sep 2034 |
| US 9,573,243 | In force Nov 2034 | Nov 2034 |
| US 9,601,137 | In force Jan 2035 | Jan 2035 |
| US 9,412,397 | In force Jan 2035 | Jan 2035 |
| US 9,608,200 | this patent May 2035 | May 2035 |
| US 9,361,912 | In force Apr 2035 | Apr 2035 |
| US 9,361,923 | In force Apr 2035 | Apr 2035 |
8 of 28 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 20, 2015 Reel 35678, frame 824 | Shen, Dongna; Wang, Yu-jen; Zhong, Tom | Headway Technologies, Inc. | 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
May 2035
Term ends May 11, 2035. Maintenance fees still fall due before then
Note
The 45 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
10
later US patents cite this one
That is above the median of utility patents granted in 2017 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.