116 patents currently held

24 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.

1 more record may belong here and awaits a decision; it is not counted.

The next term ends in Apr 2030. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Apr 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 2043 2044 2045

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

Semi-Solid Electrodes Having High Rate Capability US 11,811,119

Cited by 76 later US patents, top 1% of utility patents granted in 2023 in our data. Protection runs to 2033. A terminal disclaimer caps this term to an earlier patent's.

Ends Apr 2033 · Medium confidence Also notable

Electrochemical Cells and Methods of Manufacturing the Same US 11,646,437

Cited by 79 later US patents, top 1% of utility patents granted in 2023 in our data. Protection runs to 2033.

Ends Mar 2033 · Medium confidence Also notable

Asymmetric Battery Having a Semi-Solid Cathode and High Energy Density Anode US 11,394,049

Cited by 84 later US patents, top 1% of utility patents granted in 2022 in our data. Protection runs to 2034. A terminal disclaimer caps this term to an earlier patent's.

Ends Mar 2034 · High confidence

Formerly held, still cited

Notable

High Energy Density Redox Flow Device US 11,342,567

Cited by 123 later US patents, top 1% of utility patents granted in 2022 in our data. Protection runs to 2029. A terminal disclaimer caps this term to an earlier patent's.

now held by Massachusetts Institute of Technology

Ends Oct 2029 · 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 23, 2026
The maintenance fee for Batteries Utilizing Electrode Coatings Directly on Nanoporous Separators (US 9,065,120) comes due Dec 23, 2026. Unpaid by Jun 23, 2027, it lapses early.
2 fees due Feb 25 to 28, 2027 · next Feb 25
5 fees due Mar 3 to 19, 2027 · next Mar 3
1 fee due Apr 3, 2027
The maintenance fee for Lithium Batteries Utilizing Nanoporous Separator Layers (US 11,777,176) comes due Apr 3, 2027. Unpaid by Oct 4, 2027, it lapses early.
4 fees due May 3 to 19, 2027 · next May 3
4 fees due Jun 1 to 30, 2027 · next Jun 1
3 fees due Jul 9 to 30, 2027 · next Jul 9
3 fees due Aug 18 to 23, 2027 · next Aug 18
3 fees due Sep 22 to 26, 2027 · next Sep 22
2 fees due Oct 16 to 28, 2027 · next Oct 16
1 fee due Nov 12, 2027
The maintenance fee for Lithium Batteries Utilizing Nanoporous Separator Layers (US 10,651,444) comes due Nov 12, 2027. Unpaid by May 12, 2028, 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.

What they patent

The 5 largest of its 38 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Lithium Batteries Utilizing Nanoporous Separator Layers	15 in force	to May 2032
Semi-Solid Electrodes Having High Rate Capability	9 in force	to Apr 2033
Systems and Methods for Minimizing and Preventing Dendrite Formation in Electrochemical Cells	8 in force	to Dec 2043
Electrochemical Cells and Methods of Manufacturing the Same	7 in force	to Dec 2033
Systems and Methods for Series Battery Charging	6 in force	to Jul 2036

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,293,781	Fuel System Using Redox Flow Battery In force Term ends Apr 6, 2030 · High confidence	In force	Term ends Apr 6, 2030	High confidence
US 9,583,780	Fuel System Using Redox Flow Battery In force Term ends Apr 6, 2030 · High confidence	In force	Term ends Apr 6, 2030	High confidence
US 8,962,182	Batteries Utilizing Anode Coatings Directly on Nanoporous Separators In force Ends no later than May 26, 2030 · Medium confidence	In force	Ends no later than May 26, 2030	Medium confidence
US 9,209,446	Lithium Batteries Utilizing Nanoporous Separator Layers In force Ends no later than May 26, 2030 · Medium confidence	In force	Ends no later than May 26, 2030	Medium confidence
US 10,950,837	Methods of Producing Batteries Utilizing Anode Metal Depositions Directly on Nanoporous Separators In force Term ends May 26, 2030 · High confidence	In force	Term ends May 26, 2030	High confidence
US 11,283,137	Methods of Producing Batteries Utilizing Anode Coatings Directly on Nanoporous Separators In force Term ends May 26, 2030 · Medium confidence	In force	Term ends May 26, 2030	Medium confidence
US 11,335,976	Batteries Utilizing Anode Coatings Directly on Nanoporous Separators In force Term ends May 26, 2030 · Medium confidence	In force	Term ends May 26, 2030	Medium confidence
US 11,387,523	Batteries Utilizing Cathode Coatings Directly on Nanoporous Separators In force Term ends May 26, 2030 · Medium confidence	In force	Term ends May 26, 2030	Medium confidence
US 11,605,862	Batteries Utilizing Anode Coatings Directly on Nanoporous Separators In force Term ends May 26, 2030 · High confidence	In force	Term ends May 26, 2030	High confidence
US 11,621,459	Batteries Utilizing Anode Coatings Directly on Nanoporous Separators In force Term ends May 26, 2030 · High confidence	In force	Term ends May 26, 2030	High confidence

10 of 116 patents shown.

Pro members see all 116.

Pro members: see all 116 patents

Also on record, not counted in the 116: 24 patents in force now held by others · 45 applications pending · 41 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.

Export every term end as CSV · Pro

24M Technologies, Inc.