Collateral for a security interest recorded Mar 12, 2021 (HSBC Bank USA, National Association).
Term ends Oct 30, 2030 · High confidence
20-year base term ends Mar 16, 2030
Held by Tronox LLC
Filed Mar 16, 2010 as application 12/725,010 · Granted May 15, 2012
Base term plus 228 days of patent term adjustment (USPTO delay)
Today
2010
2030
Clock starts
Mar 16, 2010
Mar 16, 2010
Term ends
Oct 30, 2030
Oct 30, 2030
Granted
May 15, 2012
May 15, 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
228
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.
23
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 228 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 Mar 16, 2010, when this application, 12/725,010, was filed | Mar 16, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +228 days, USPTO patent term adjustment record | Oct 30, 2030 | 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 | Oct 30, 2030 | High confidence |
This family
| US 7,264,672 | Term ended Oct 2026 | Oct 2026 |
| US 7,622,097 | In force Jan 2028 | Jan 2028 |
| US 9,028,913 | Lapsed on the fee record May 2023 | May 2023 |
| US 7,717,999 | In force Dec 2028 | Dec 2028 |
| US 8,226,911 | In force Oct 2030 | Oct 2030 |
| US 8,057,770 | In force Jul 2027 | Jul 2027 |
| US 8,178,065 | this patent Oct 2030 | Oct 2030 |
| US 7,824,322 | Lapsed on the fee record Nov 2022 | Nov 2022 |
8 of 23 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 |
|---|---|---|---|
| Apr 23, 2010 Reel 24277, frame 322 | Al-zeghayer, Yousef Saleh; Bashir, Sami M.; Yaser, Ahmed V.; El Dekki, Hassan M.; Al-masry, Waheed A.; Trabzuni, Fadi M. | The National Titanium Dioxide Co. Ltd. (Cristal) | Assignment of Assignor's Interest |
| Jun 25, 2019 Reel 49583, frame 638 | The National Titanium Dioxide Co. Ltd. (Cristal) | Tronox LLC | Assignment of Assignor's Interest |
| May 1, 2020 Reel 52554, frame 529 | Tronox LLC | Wilmington Trust, National Association, as Collateral Agent | Security Interest |
| Mar 12, 2021 Reel 55579, frame 619 | Tronox LLC | HSBC Bank USA, National Association, as Collateral Agent | Security Interest |
| Apr 7, 2022 Reel 59629, frame 581 | Wilmington Trust, National Association | Tronox LLC | Release of Security 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
Oct 2030
Term ends Oct 30, 2030. No further fees fall due before then
Note
The 228 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 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.