12 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Feb 2032. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Feb 2032
Next term end
6
Patent families
When these terms end
Held patents by the year their term ends
notable patents
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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jul 2032 · High confidence
Also notable
Ends Aug 2039 · High confidence
Also notable
Ends Jul 2035 · High confidence
Desanding Apparatus and a Method of Using Same
US 9,938,812
The most cited patent in this portfolio, cited by 17 later US patents, top 25% of utility patents granted in 2018 in our data. Protection runs to 2032.
Gravity Desanding Apparatus with Filter Polisher
US 11,035,216
The newest of the three, granted 2021. It anchors the portfolio to 2039, later than anything else here.
Desanding Apparatus and a Method of Using the Same
US 9,861,921
Granted 2018 and renewed at every maintenance window due so far. Protection runs to 2035.
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.
- 1 fee due Jul 7, 2027The maintenance fee for Purging System for Desanding Vessels (US 10,525,381) comes due Jul 7, 2027. Unpaid by Jan 7, 2028, it lapses early.
- 1 fee due Nov 3, 2027The maintenance fee for Desanding Apparatus and a Method of Using Same (US 9,327,214) comes due Nov 3, 2027. Unpaid by May 3, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
What they patent
The 2 largest of its 6 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Desanding Apparatus and System | 5 in force | to Feb 2033 |
| Gravity Desanding Apparatus with Filter Polisher | 3 in force | to Aug 2039 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,909,405 | Desanding Apparatus and a Method of Using Same In force · High confidence | In force | High confidence | |
| US 9,938,812 | Desanding Apparatus and a Method of Using Same In force · High confidence | In force | High confidence | |
| US 9,327,214 | Desanding Apparatus and a Method of Using Same In force · High confidence | In force | High confidence | |
| US 9,695,661 | Erosion Resistant Flow Conduit In force · High confidence | In force | High confidence | |
| US 8,945,256 | Desanding Apparatus and System In force · High confidence | In force | High confidence | |
| US 9,861,921 | Desanding Apparatus and a Method of Using the Same In force · High confidence | In force | High confidence | |
| US 10,525,381 | Purging System for Desanding Vessels In force · High confidence | In force | High confidence | |
| US 10,807,020 | Method and Apparatus Using Closely Spaced Plates to Separate Fluids Having Different Rheological Properties In force · High confidence | In force | High confidence | |
| US 10,967,305 | Boundary Layer Modification in Closely-Spaced Passages In force · High confidence | In force | High confidence | |
| US 11,035,216 | Gravity Desanding Apparatus with Filter Polisher In force · High confidence | In force | High confidence |
Also on record, not counted in the 12: 3 patents ended · 1 application 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.