182 patents currently held

48 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 Feb 2027. from the record

Of the 48 now held by other companies, 37 name Berk Tek LLC as their current owner, and 11 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

Feb 2027

Next term end

181

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 2028 2029 2030 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

Threaded Hole Retainer US 9,899,822

Cited by 14 later US patents, top 25% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2036.

Ends Jan 2036 · High confidence Also notable

Polymer Composition with Improved Stress Whitening Resistance US 11,525,050

The newest of the three, granted 2022. It anchors the portfolio to 2038, later than anything else here.

Ends Sep 2038 · High confidence Also notable

Fault Detection System US 8,005,324

Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2027.

Ends Feb 2027 · High confidence

Formerly held, still cited

Notable

Reversible Polarity Mpo Fiber Optic Connector US 9,829,645

The most cited patent in this portfolio, cited by 67 later US patents, top 5% of utility patents granted in 2017 in our data. Protection runs to 2034.

now held by US Conec, Ltd.

Ends Aug 2034 · High confidence

Also notable

Reversible Polarity Mpo Fiber Optic Connector with a Removable Key US 10,031,296

Cited by 41 later US patents, top 10% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.

now held by Berk-Tek LLC

Ends Jul 2033 · 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.

3 fees due Dec 11 to 30, 2026 · next Dec 11
2 fees due Jan 23 to 28, 2027 · next Jan 23
4 fees due Feb 11 to 22, 2027 · next Feb 11
2 fees due Mar 3 to 10, 2027 · next Mar 3
8 fees due Apr 3 to 24, 2027 · next Apr 3
2 fees due May 7, 2027
3 fees due Jun 5 to 19, 2027 · next Jun 5
3 fees due Jul 7 to 16, 2027 · next Jul 7
2 fees due Aug 6 to 16, 2027 · next Aug 6
5 fees due Sep 12 to 26, 2027 · next Sep 12
3 fees due Oct 2 to 16, 2027 · next Oct 2

Which patents, and when each one lapses · Pro

Recent changes

Nov 6Assignment recorded on 1 record: Frisk, Nils-Bertil and 3 others to Nexans Recorded Nov 6, 2026, executed Sep 21, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76667, frame 631.
Oct 6Assignment recorded on 1 record: Doedens, Espen and 1 other to Nexans Recorded Oct 6, 2026, executed Dec 12, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76276, frame 873.
3 of the patents on this record were granted since Aug 16, 2026

What they patent

The 5 largest of its 181 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Polymer Composition with Improved Stress Whitening Resistance	2 in force	to Sep 2038
Method for inspecting surfaces and interfaces of high voltage cable components	1 in force	to Jan 2044
Cable joints in wet or semi-wet cable systems	1 in force	to Jan 2043
Process for the manufacture of a fire-resistant and/or fire-retardant cable	1 in force	to Oct 2042
Method for producing coaxial cables having a thin-walled, radially closed outer conductor	1 in force	to Jul 2042

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,005,324	Fault Detection System In force Term ends Feb 20, 2027 · High confidence	In force	Term ends Feb 20, 2027	High confidence
US 7,381,900	Power Cable for Direct Electric Heating System In force Term ends Mar 26, 2027 · High confidence	In force	Term ends Mar 26, 2027	High confidence
US 7,605,329	Terminal Structure In force Term ends Jun 2, 2027 · High confidence	In force	Term ends Jun 2, 2027	High confidence
US 7,629,535	Electric Submarine Power Cable and System for Direct Electric Heating In force Term ends Nov 8, 2027 · High confidence	In force	Term ends Nov 8, 2027	High confidence
US 7,681,435	Arrangement for Monitoring the Leak-Tightness of an Evacuated Space In force Term ends Feb 17, 2028 · High confidence	In force	Term ends Feb 17, 2028	High confidence
US 7,681,599	Line Pipe for the Transport of Deep-Frozen Media In force Term ends Aug 26, 2028 · High confidence	In force	Term ends Aug 26, 2028	High confidence
US 8,317,443	Shear Screw In force Term ends Nov 17, 2028 · High confidence	In force	Term ends Nov 17, 2028	High confidence
US 7,884,282	Swellable Tapes and Yarns to Replace Strand Filling Compounds In force Term ends Apr 11, 2029 · High confidence	In force	Term ends Apr 11, 2029	High confidence
US 7,999,182	Device for Connecting Two Superconductive Cables In force Term ends Aug 4, 2029 · High confidence	In force	Term ends Aug 4, 2029	High confidence
US 8,152,411	Guide Arrangement In force Term ends Apr 17, 2030 · High confidence	In force	Term ends Apr 17, 2030	High confidence

10 of 182 patents shown.

Pro members see all 182.

Pro members: see all 182 patents

Also on record, not counted in the 182: 48 patents in force now held by others · 321 patents ended · 95 applications pending · 191 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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