71 patents currently held

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

The next term ends in Dec 2030. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Dec 2030

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 204320442045

notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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

Casing Float Tool US 10,883,314

Cited by 34 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2033.

Ends Jun 2033 · High confidence Also notable

Tools and Methods for Use in Completion of a Wellbore US 8,794,331

Cited by 44 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

Apparatuses, Systems and Methods for Producing Hydrocarbon Material from a Subterranean Formation US 11,434,735

A family of 17 related applications built on the 2022 grant. Protection runs to 2039.

Ends Jan 2039 · High confidence

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 Dec 25, 2026
The maintenance fee for Apparatuses and Methods for Enabling Multistage Hydraulic Fracturing (US 10,329,867) comes due Dec 25, 2026. Unpaid by Jun 25, 2027, it lapses early.
2 fees due Jan 9 to 11, 2027 · next Jan 9
1 fee due Feb 22, 2027
The maintenance fee for In Situ Injection or Production via a Well Using Selective Operation of Multi-Valve Assemblies with Choked Configurations (US 11,732,559) comes due Feb 22, 2027. Unpaid by Aug 23, 2027, it lapses early.
1 fee due Mar 22, 2027
The maintenance fee for Downhole Isolation and Depressurization Tool (US 9,140,098) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
2 fees due Apr 1 to 29, 2027 · next Apr 1
4 fees due May 5 to 21, 2027 · next May 5
2 fees due Jul 9 to 12, 2027 · next Jul 9
2 fees due Sep 5 to 12, 2027 · next Sep 5
2 fees due Oct 7 to 16, 2027 · next Oct 7
1 fee due Nov 10, 2027
The maintenance fee for Downhole Assembly with Debris Relief, and Method for Using Same (US 9,334,714) comes due Nov 10, 2027. Unpaid by May 10, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nov 10Assignment recorded on 1 record: Gillis, Brock to NCS Multistage Inc. Recorded Nov 10, 2026, executed Sep 15, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76697, frame 739.
2 of the patents on this record were granted since Aug 17, 2026
1 term has ended since Aug 17, 2026

What they patent

The 5 largest of its 42 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Apparatuses and Methods for Locating and Shifting a Downhole Flow Control Member	10 in force	to Dec 2040
Casing Float Tool	6 in force	to Aug 2035
Tools and Methods for Use in Completion of a Wellbore	5 in force	to Dec 2032
Method for Injecting Fluid into a Formation to Produce Oil	3 in force	to Aug 2038
Rupture Disc Assembly	2 in force	to Mar 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,334,714	Downhole Assembly with Debris Relief, and Method for Using Same In force Term ends Dec 8, 2030 · High confidence	In force	Term ends Dec 8, 2030	High confidence
US 8,490,702	Downhole Tool Assembly with Debris Relief, and Method for Using Same In force Term ends Oct 5, 2031 · High confidence	In force	Term ends Oct 5, 2031	High confidence
US 10,344,561	Tools and Methods for Use in Completion of a Wellbore In force Term ends Jul 12, 2032 · High confidence	In force	Term ends Jul 12, 2032	High confidence
US 10,227,845	Tools and Methods for Use in Completion of a Wellbore In force Term ends Sep 15, 2032 · High confidence	In force	Term ends Sep 15, 2032	High confidence
US 8,794,331	Tools and Methods for Use in Completion of a Wellbore In force Term ends Sep 30, 2032 · High confidence	In force	Term ends Sep 30, 2032	High confidence
US 9,745,826	Tools and Methods for Use in Completion of a Wellbore In force Term ends Nov 4, 2032 · High confidence	In force	Term ends Nov 4, 2032	High confidence
US 9,140,098	Downhole Isolation and Depressurization Tool In force Term ends Dec 10, 2032 · High confidence	In force	Term ends Dec 10, 2032	High confidence
US 9,234,412	Tools and Methods for Use in Completion of a Wellbore In force Term ends Dec 23, 2032 · High confidence	In force	Term ends Dec 23, 2032	High confidence
US 8,931,559	Downhole Isolation and Depressurization Tool In force Term ends Mar 11, 2033 · High confidence	In force	Term ends Mar 11, 2033	High confidence
US 10,465,445	Casing Float Tool In force Term ends Jun 28, 2033 · High confidence	In force	Term ends Jun 28, 2033	High confidence

10 of 71 patents shown.

Pro members see all 71.

Pro members: see all 71 patents

Also on record, not counted in the 71: 15 patents ended · 9 applications pending · 26 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.

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NCS Multistage Inc.