24 patents currently held

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

The next term ends in Jul 2035. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2035

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028202920302031203220332034203520362037 2038 2039 2040 20412042204320442045

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

Spacers for Ion-Exchange Device US 11,311,820

Cited by 7 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2039.

Ends Dec 2039 · High confidence Also notable

Diagnostic Methods and Apparatus for Electrodialysis US 11,701,619

Cited by 4 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2041.

Ends Dec 2041 · High confidence Also notable

Electrodialysis Process and Bipolar Membrane Electrodialysis Devices for Silica Removal US 11,577,202

Cited by 5 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2041.

Ends Jun 2041 · 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 Jan 18, 2027
The maintenance fee for Diagnostic Methods and Apparatus for Electrodialysis (US 11,701,619) comes due Jan 18, 2027. Unpaid by Jul 19, 2027, it lapses early.
1 fee due Feb 28, 2027
The maintenance fee for Liquid Crystallizer Salting Out Solution (US 11,739,005) comes due Feb 28, 2027. Unpaid by Aug 30, 2027, it lapses early.
1 fee due Jun 5, 2027
The maintenance fee for Bipolar Electrochemical Spacer (US 11,833,474) comes due Jun 5, 2027. Unpaid by Dec 6, 2027, it lapses early.
2 fees due Aug 27, 2027
2 fees due Sep 5 to 30, 2027 · next Sep 5

Which patents, and when each one lapses · Pro

Recent changes

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

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.

Spacers for Ion-Exchange Device	5 in force	to Dec 2039
3D Printed Spacers for Ion-Exchange Device	3 in force	to Sep 2041
Diagnostic Methods and Apparatus for Electrodialysis	2 in force	to Dec 2041
Hybrid Electrochemical and Membrane-Based Processes for Treating Water with High Silica Concentrations	2 in force	to Jun 2041
Electrodialysis Process and Bipolar Membrane Electrodialysis Devices for Silica Removal	2 in force	to Jun 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,666,873	Apparatus and Methods for Treating Water and Generating Electrical Power In force Term ends Jul 28, 2035 · High confidence	In force	Term ends Jul 28, 2035	High confidence
US 10,604,426	High Efficiency Electrochemical Desalination System That Incorporates Participating Electrodes In force Term ends Jun 19, 2037 · High confidence	In force	Term ends Jun 19, 2037	High confidence
US 10,799,834	Bipolar Electrochemical Spacer In force Term ends Jul 20, 2038 · High confidence	In force	Term ends Jul 20, 2038	High confidence
US 11,833,474	Bipolar Electrochemical Spacer In force Term ends Dec 9, 2038 · High confidence	In force	Term ends Dec 9, 2038	High confidence
US 11,911,729	3D Printed Spacers for Ion-Exchange Device In force Term ends Jun 24, 2039 · High confidence	In force	Term ends Jun 24, 2039	High confidence
US 12,330,121	3D Printed Spacers for Ion-Exchange Device In force Term ends Jun 24, 2039 · High confidence	In force	Term ends Jun 24, 2039	High confidence
US 11,020,713	Ion Selective Membrane with Ionophores In force Term ends Aug 7, 2039 · High confidence	In force	Term ends Aug 7, 2039	High confidence
US 11,998,876	Diagnostic Methods and Apparatus for Electrodialysis In force Term ends Oct 11, 2039 · High confidence	In force	Term ends Oct 11, 2039	High confidence
US 11,571,637	Spacers for Ion-Exchange Device In force Term ends Nov 15, 2039 · High confidence	In force	Term ends Nov 15, 2039	High confidence
US 11,638,886	Spacers for Ion-Exchange Device In force Term ends Nov 15, 2039 · High confidence	In force	Term ends Nov 15, 2039	High confidence

10 of 24 patents shown.

Pro members see all 24.

Pro members: see all 24 patents

Also on record, not counted in the 24: 10 applications pending · 2 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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