11 patents currently held

5 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.

The next term ends in Sep 2041. from the record

Of the 5 now held by other companies, 4 name Refinyx AB 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

Sep 2041

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

2026202720282029203020312032203320342035203620372038203920402041 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

Cylindrical Secondary Cell and a Method of Its MAN18-12090 US 11,664,561

The newest of the three, granted 2023. It anchors the portfolio to 2042, later than anything else here.

Ends Apr 2042 · High confidence Also notable

Cylindrical Secondary Cell and a Method of Its Manufacture US 11,757,160

The newest of the three, granted 2023. It anchors the portfolio to 2042, later than anything else here.

Ends Apr 2042 · High confidence Also notable

Terminal for a Secondary Cell and a Terminal Rivet US 11,450,933

The earliest of the three still in force, granted 2022 and renewed since. Its term ends first, in 2041.

Ends Dec 2041 · High confidence

Formerly held, still cited

Notable

Process for Producing Crystallized Metal Sulfates US 10,995,014

The most cited patent in this portfolio, cited by 6 later US patents, top 25% of utility patents granted in 2021 in our data. Protection runs to 2040.

now held by Refinyx AB

Ends Oct 2040 · High confidence

Also notable

Process for the Recovery of Cathode Materials in the Recycling of Batteries by Removing Aluminum and Iron US 11,509,000

Granted 2022. Computed term ends 2040.

now held by Refinyx AB

Ends Apr 2040 · 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 Nov 30, 2026
The maintenance fee for Cylindrical Secondary Cell and a Method of Its MAN18-12090 (US 11,664,561) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
1 fee due Dec 6, 2026
The maintenance fee for Cylindrical Secondary Cell (US 11,670,815) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
1 fee due Mar 12, 2027
The maintenance fee for Cylindrical Secondary Cell and a Method of Its Manufacture (US 11,757,160) comes due Mar 12, 2027. Unpaid by Sep 13, 2027, it lapses early.
1 fee due Jul 30, 2027
The maintenance fee for Secondary Cell (US 11,888,182) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Oct 26Assignment recorded on 1 record: Henning Hess, Lars to Northvolt AB Recorded Oct 26, 2026, executed Nov 9, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76501, frame 862.

What they patent

The 4 largest of its 10 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Pre-Fabricated Movable Walk-In Chamber for Testing Secondary Cells	2 in force	to Dec 2042
Cylindrical Secondary Cell and a Method of Its Manufacture	1 in force	to Apr 2042
Terminal for a Secondary Cell and a Terminal Rivet	1 in force	to Dec 2041
Process for Preparing Battery Grade Metal Sulphate Solutions	1 in force	to Sep 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 12,637,362	Process for Preparing Battery Grade Metal Sulphate Solutions held by Northvolt AB and Metal Trade Overseas AG In force Term ends Sep 7, 2041 · High confidence	In force	Term ends Sep 7, 2041	High confidence
US 11,450,933	Terminal for a Secondary Cell and a Terminal Rivet In force Term ends Dec 1, 2041 · High confidence	In force	Term ends Dec 1, 2041	High confidence
US 11,664,561	Cylindrical Secondary Cell and a Method of Its MAN18-12090 In force Term ends Apr 15, 2042 · High confidence	In force	Term ends Apr 15, 2042	High confidence
US 11,757,160	Cylindrical Secondary Cell and a Method of Its Manufacture In force Term ends Apr 15, 2042 · High confidence	In force	Term ends Apr 15, 2042	High confidence
US 11,670,815	Cylindrical Secondary Cell In force Term ends Apr 18, 2042 · High confidence	In force	Term ends Apr 18, 2042	High confidence
US 11,888,182	Secondary Cell In force Term ends Aug 29, 2042 · High confidence	In force	Term ends Aug 29, 2042	High confidence
US 11,982,685	Pre-Fabricated Movable Walk-In Chamber for Testing Secondary Cells In force Term ends Dec 1, 2042 · High confidence	In force	Term ends Dec 1, 2042	High confidence
US 12,510,561	Pre-Fabricated Movable Walk-In Chamber for Testing Secondary Cells In force Term ends Dec 1, 2042 · High confidence	In force	Term ends Dec 1, 2042	High confidence
US 12,512,540	Cylindrical Secondary Cell Lid Comprising Multiple Recessed Contact Portions In force Term ends May 22, 2043 · High confidence	In force	Term ends May 22, 2043	High confidence
US 12,211,986	Method and Control Arrangement for Monitoring Coating Quality of Secondary Cells In force Term ends May 2, 2044 · High confidence	In force	Term ends May 2, 2044	High confidence

10 of 11 patents shown.

Pro members see all 11.

Pro members: see all 11 patents

Also on record, not counted in the 11: 5 patents in force now held by others · 68 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.

Export every term end as CSV · Pro

Northvolt AB