19 patents currently held

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

The next term ends in Nov 2037. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Nov 2037

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 2041 2042 204320442045

notable patents 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.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Lithium Extraction in the Presence of Scalants US 11,358,875

Cited by 28 later US patents, top 5% of utility patents granted in 2022 in our data. Protection runs to 2041.

Ends Jun 2041 · High confidence Also notable

Lithium Extraction with Coated Ion Exchange Particles US 10,150,056

The most cited patent in this portfolio, cited by 58 later US patents, top 5% of utility patents granted in 2018 in our data. Protection runs to 2037.

Ends Nov 2037 · High confidence Also notable

Integrated System for Lithium Extraction and Conversion US 10,648,090

Cited by 51 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2039. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.

Ends no later than Feb 2039 · Low 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.

2 fees due Apr 8 to 24, 2027 · next Apr 8
1 fee due May 7, 2027
The maintenance fee for Lithium Extraction with Coated Ion Exchange Particles (US 11,806,641) comes due May 7, 2027. Unpaid by Nov 8, 2027, it lapses early.
1 fee due Jun 10, 2027
The maintenance fee for Ion Exchange System for Lithium Extraction (US 10,505,178) comes due Jun 10, 2027. Unpaid by Dec 10, 2027, it lapses early.
1 fee due Jul 9, 2027
The maintenance fee for Ion Exchange Reactor with Particle Traps for Lithium Extraction (US 11,865,531) comes due Jul 9, 2027. Unpaid by Jan 10, 2028, it lapses early.
1 fee due Oct 23, 2027
The maintenance fee for Lithium Extraction in the Presence of Scalants (US 11,964,876) comes due Oct 23, 2027. Unpaid by Apr 24, 2028, it lapses early.
2 fees due Nov 7 to 12, 2027 · next Nov 7

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.

Lithium Extraction with Coated Ion Exchange Particles	3 in force	to Mar 2038
Lithium Extraction in the Presence of Scalants	2 in force	to Jun 2041
Ion Exchange Reactor with Particle Traps for Lithium Extraction	2 in force	to Dec 2040
Ion Exchange System for Lithium Extraction	2 in force	to Aug 2038
Lithium Extraction with Porous Ion Exchange Beads	2 in force	to Aug 2038

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 10,150,056	Lithium Extraction with Coated Ion Exchange Particles In force Term ends Nov 13, 2037 · High confidence	In force	Term ends Nov 13, 2037	High confidence
US 11,806,641	Lithium Extraction with Coated Ion Exchange Particles In force Term ends Nov 13, 2037 · Low confidence	In force	Term ends Nov 13, 2037	Low confidence
US 10,695,694	Lithium Extraction with Coated Ion Exchange Particles In force Term ends Mar 14, 2038 · Medium confidence	In force	Term ends Mar 14, 2038	Medium confidence
US 10,439,200	Ion Exchange System for Lithium Extraction In force Term ends Aug 1, 2038 · High confidence	In force	Term ends Aug 1, 2038	High confidence
US 10,505,178	Ion Exchange System for Lithium Extraction In force Term ends Aug 1, 2038 · High confidence	In force	Term ends Aug 1, 2038	High confidence
US 11,253,848	Lithium Extraction with Porous Ion Exchange Beads In force Term ends Aug 1, 2038 · High confidence	In force	Term ends Aug 1, 2038	High confidence
US 11,794,182	Lithium Extraction with Porous Ion Exchange Beads In force Term ends Aug 1, 2038 · High confidence	In force	Term ends Aug 1, 2038	High confidence
US 10,648,090	Integrated System for Lithium Extraction and Conversion In force Ends no later than Feb 13, 2039 · Low confidence	In force	Ends no later than Feb 13, 2039	Low confidence
US 11,975,317	Ion Exchange Reactor with Particle Traps for Lithium Extraction In force Term ends Feb 27, 2039 · High confidence	In force	Term ends Feb 27, 2039	High confidence
US 11,865,531	Ion Exchange Reactor with Particle Traps for Lithium Extraction In force Term ends Dec 14, 2040 · High confidence	In force	Term ends Dec 14, 2040	High confidence

10 of 19 patents shown.

Pro members see all 19.

Pro members: see all 19 patents

Also on record, not counted in the 19: 14 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.

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

Export every term end as CSV · Pro

Lilac Solutions, Inc.