13 patents currently held

6 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.

5 more records may belong here and await a decision; they are not counted.

The next term ends in Jul 2028. from the record

Of the 6 now held by other companies, 5 name Global TBM Company as their current owner, and 1 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2028

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028 2029 2030 2031 203220332034203520362037203820392040204120422043 20442045

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

Progressing Cavity Pump/Motor US 8,905,733

Cited by 20 later US patents, top 25% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.

Ends Sep 2032 · High confidence Also notable

Downhole Power Generator and Method US 7,814,993

Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2028.

Ends Dec 2028 · High confidence Also notable

Progressing Cavity Pump/Motor US 8,109,746

Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2030.

Ends Aug 2030 · High confidence

Fee deadlines

No maintenance fee falls due on this company's record before Nov 10, 2027.

Recent changes

1 term has ended since Aug 16, 2026

What they patent

The 5 largest of its 13 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Tunnel Boring Machine for Excavating Semicircular-Arched Tunnels	1 in force	to Jan 2044
Apparatus to Extend Lift Capacity of Sidewall Belt Conveyor	1 in force	to Jun 2043
Progressing Cavity Pump/Motor (2011)	1 in force	to Sep 2032
Variable Speed Progressing Cavity Pump System	1 in force	to May 2031
Progressing Cavity Pump/Motor (2009)	1 in force	to Oct 2030

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,793,717	Progressive Cavity Pump Rod Guide held by Robbins & Myers Energy Systems L.P. In force Term ends Jul 15, 2028 · High confidence	In force	Term ends Jul 15, 2028	High confidence
US 7,814,993	Downhole Power Generator and Method held by Robbins & Myers Energy Systems L.P. In force Term ends Dec 24, 2028 · High confidence	In force	Term ends Dec 24, 2028	High confidence
US 7,854,259	PC Rod Guide with Rotor Ridges held by Robbins & Myers Energy Systems L.P. In force Term ends Jan 8, 2029 · High confidence	In force	Term ends Jan 8, 2029	High confidence
US 8,109,746	Progressing Cavity Pump/Motor held by Robbins & Myers Energy Systems, L.P. In force Term ends Aug 7, 2030 · High confidence	In force	Term ends Aug 7, 2030	High confidence
US 8,113,289	Flow Regulator for Downhole Progressing Cavity Motor held by Robbins & Myers Energy Systems L.P. In force Term ends Aug 9, 2030 · High confidence	In force	Term ends Aug 9, 2030	High confidence
US 8,147,228	Progressing Cavity Pump/Motor held by Robbins & Myers Energy Systems L.P. In force Term ends Oct 2, 2030 · High confidence	In force	Term ends Oct 2, 2030	High confidence
US 8,272,434	Tubing String Hanger and Tensioner Assembly held by Robbins & Myers Energy Systems L.P. In force Term ends Dec 9, 2030 · High confidence	In force	Term ends Dec 9, 2030	High confidence
US 8,529,214	Variable Speed Progressing Cavity Pump System held by Robbins & Myers Energy Systems L.P. In force Term ends May 21, 2031 · High confidence	In force	Term ends May 21, 2031	High confidence
US 8,672,656	Progressing Cavity Pump/Motor held by Robbins & Myers Energy Systems L.P. In force Term ends Sep 9, 2031 · High confidence	In force	Term ends Sep 9, 2031	High confidence
US 8,905,733	Progressing Cavity Pump/Motor held by Robbins & Myers Energy Systems L.P. In force Term ends Sep 10, 2032 · High confidence	In force	Term ends Sep 10, 2032	High confidence

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents

Also on record, not counted in the 13: 6 patents in force now held by others · 36 patents ended · 3 applications pending · 10 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.

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

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Robbins, Inc.