Also listed on Applied Spintronics, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 20, 2029 · High confidence
20-year base term ends Apr 24, 2027
Filed Apr 24, 2007 as application 11/789,324 · Granted Dec 14, 2010
Base term plus 696 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Apr 24, 2007
Apr 24, 2007
Term ends
Mar 20, 2029
Mar 20, 2029
Granted
Dec 14, 2010
Dec 14, 2010
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
696
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.
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 696 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 Apr 24, 2007, when this application, 11/789,324, was filed | Apr 24, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +696 days, USPTO patent term adjustment record | Mar 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 | Mar 20, 2029 | High confidence |
This family
| US 7,528,457 | Term ended Nov 2026 | Nov 2026 |
| US 7,456,029 | In force Mar 2027 | Mar 2027 |
| US 7,595,520 | In force Nov 2026 | Nov 2026 |
| US 8,133,439 | In force Oct 2028 | Oct 2028 |
| US 7,838,436 | In force Oct 2028 | Oct 2028 |
| US 7,672,093 | In force Jun 2028 | Jun 2028 |
| US 7,508,042 | In force Jan 2027 | Jan 2027 |
| US 7,598,579 | In force May 2027 | May 2027 |
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 |
|---|---|---|---|
| Jun 28, 2007 Reel 19492, frame 995 | Yang, Hsu Kai; Wang, Po Kang | Magic Technologies, Inc.; Applied Spintronics, Inc. | Assignment of Assignor's Interest |
| Jun 28, 2007 reel/frame not recorded | Wang, Po Kang; Yang, Hsu Kai | Magic Technologies, Inc. | Assignment of Assignor's Interest |
| Jun 28, 2007 reel/frame not recorded | Wang, Po Kang; Yang, Hsu Kai | Applied Spintronics, Inc. | Assignment of Assignor's Interest |
| May 27, 2010 Reel 24445, frame 250 | Applied Spintronics Technology, Inc. | Magic Technologies, Inc. | Assignment of Assignor's Interest |
| Jan 9, 2014 Reel 31956, frame 645 | Magic Technologies, Inc. | Headway Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 25, 2019 Reel 48692, frame 917 | Headway Technologies, Inc. | Taiwan Semiconductor Manufacturing Company, 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
Mar 2029
Term ends Mar 20, 2029. No further fees fall due before then
Note
The 696 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
70
later US patents cite this one
That is top 10% of utility patents granted in 2010 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.