Step Energy Services Ltd.

12 patents currently held · Updated Nov 15, 2026

1 more in force is now held by another company

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Mar 2027

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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.

2 fees due Feb 4 to 11, 2027 · next Feb 4
1 fee due Mar 3, 2027
The maintenance fee for Method and apparatus for selecting diversion material for a wellbore operation (US 10,400,577) comes due Mar 3, 2027. Unpaid by Sep 3, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Patent	Title	Status	Expires	Confidence
US 8,689,876	Liquified Petroleum Gas Fracturing System In force Term ends Mar 2, 2027 · High confidence	In force	Term ends Mar 2, 2027	High confidence
US 8,276,659	Proppant Addition System and Method In force Term ends Nov 7, 2028 · High confidence	In force	Term ends Nov 7, 2028	High confidence
US 8,408,289	Liquified Petroleum Gas Fracturing System In force Term ends Nov 7, 2028 · High confidence	In force	Term ends Nov 7, 2028	High confidence
US 8,025,099	Water Transfer System In force Term ends May 28, 2029 · High confidence	In force	Term ends May 28, 2029	High confidence
US 9,096,788	Breakers for Gelled Fracturing Fluids In force Term ends Mar 23, 2030 · Medium confidence	In force	Term ends Mar 23, 2030	Medium confidence
US 8,871,693	Volatile-Phosphorus Free Gelling Agents In force Term ends Mar 22, 2031 · High confidence	In force	Term ends Mar 22, 2031	High confidence
US 9,683,432	Hybrid LPG Frac In force Term ends May 14, 2033 · High confidence	In force	Term ends May 14, 2033	High confidence
US 9,103,190	Inert Gas Supply Equipment for Oil and Gas Well Operations In force Term ends Feb 19, 2034 · High confidence	In force	Term ends Feb 19, 2034	High confidence
US 9,664,025	Pressure Balancing Proppant Addition Method and Apparatus In force Term ends Aug 30, 2034 · High confidence	In force	Term ends Aug 30, 2034	High confidence
US 10,190,040	Self-Suspending Proppant for Hydraulic Fracturing In force Term ends Mar 27, 2037 · High confidence	In force	Term ends Mar 27, 2037	High confidence

10 of 12 patents shown.

Pro members see all 12.

Pro members: see all 12 patents

Also on record, not counted in the 12: 1 patent in force now held by others. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Published applications

Every application published under this name has become a patent.