58 patents currently held
3 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
21 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
22
Ending by 2030
Nov 2026
Next term end
41
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
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
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Apr 2029 · High confidence
Also notable
Ends Oct 2030 · High confidence
Also notable
Ends Mar 2028 · High confidence
Catalyst Promoters in Vanadium-Free Mobile Catalyst
US 8,148,295
Cited by 25 later US patents, top 25% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029. A terminal disclaimer caps this term to an earlier patent's.
Photocatalyst Comprising TIO2 and Activated Carbon Made from Date Pits
US 8,178,065
The largest patent family in this portfolio, 18 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Nanocomposite Particle and Process of Preparing the Same
US 7,820,583
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2028.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 3 fees due Feb 6 to 18, 2027 · next Feb 6
- 1 fee due Mar 10, 2027The maintenance fee for Titanium Dioxide Pigment and Manufacturing Method (US 10,407,544) comes due Mar 10, 2027. Unpaid by Sep 10, 2027, it lapses early.
- 2 fees due Apr 6 to 13, 2027 · next Apr 6
- 1 fee due Aug 16, 2027The maintenance fee for Mesoporous Titanium Dioxide Nanoparticles and Process for Their Production (US 9,260,318) comes due Aug 16, 2027. Unpaid by Feb 16, 2028, it lapses early.
- 1 fee due Oct 19, 2027The maintenance fee for Titanium Dioxide Pigment and Manufacturing Method (US 9,315,615) comes due Oct 19, 2027. Unpaid by Apr 19, 2028, it lapses early.
- 1 fee due Nov 5, 2027The maintenance fee for NOx Reducing Coatings and Methods for Reducing NOx Therewith (US 10,639,614) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
- 6 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 41 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Process for Hydrothermal Production of Sodium Silicate Solutions and Precipitated Silicas | 9 in force | to Oct 2034 |
| Mobile Denox Catalyst | 3 in force | to Aug 2029 |
| Centrifugal Aluminum Chloride Generator | 2 in force | to Apr 2040 |
| Polymer, Polymer Modified Titanium Dioxide Pigment, and Method of Forming a Pigmented Paint Formulation | 2 in force | to Apr 2035 |
| Titanium Dioxide Pigment and Manufacturing Method | 2 in force | to Feb 2034 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,238,231 | Process for Manufacturing Zirconia-Treated Titanium Dioxide Pigments In force · High confidence | In force | High confidence | |
| US 8,088,853 | Polysiloxane Modified Titanium Dioxide In force · High confidence | In force | High confidence | |
| US 8,057,770 | Process for Hydrothermal Production of Sodium Silicate Solutions and Precipitated Silicas In force · Medium confidence | In force | Medium confidence | |
| US 8,287,833 | Sodium Silicate Solutions In force · High confidence | In force | High confidence | |
| US 7,932,208 | Transparent, Stable Titanium Dioxide Sols In force · High confidence | In force | High confidence | |
| US 7,622,097 | Process for Hydrothermal Production of Sodium Silicate Solutions and Precipitated Silicas In force · High confidence | In force | High confidence | |
| US 7,763,565 | Transparent, Stable Titanium Dioxide Sols In force · High confidence | In force | High confidence | |
| US 7,776,954 | Photocatalytic Coating Compositions In force · High confidence | In force | High confidence | |
| US 7,820,583 | Nanocomposite Particle and Process of Preparing the Same In force · High confidence | In force | High confidence | |
| US 8,128,127 | Changing Fluid Flow Direction In force · High confidence | In force | High confidence |
Also on record, not counted in the 58: 3 patents in force now held by others · 70 patents ended · 4 applications pending · 13 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.