144 patents currently held

1 more in force is now held by another company

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

The next term ends in Jan 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jan 2027

Next term end

141

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

Nuclear Fuel Claddings, Production Method Thereof and Uses of Same Against Oxidation/Hydriding US 11,170,905

Cited by 14 later US patents, top 25% of utility patents granted in 2021 in our data. Protection runs to 2036.

Ends Jun 2036 · High confidence Also notable

Method for Conditioning a Power-Generating Circulatory System of a Power Plant US 10,315,234

Granted 2019. Computed term ends 2034. A terminal disclaimer caps this term to an earlier patent's.

Ends Nov 2034 · High confidence Also notable

Apparatus for Repairing a Damaged Area in an Underwater Wall Region of a Vessel or Pool US 8,371,025

Renewed at every maintenance window since the 2013 grant; no more fees are due before its term ends in 2029.

Ends Sep 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.

5 fees due Dec 6 to 25, 2026 · next Dec 6
5 fees due Jan 2 to 30, 2027 · next Jan 2
2 fees due Feb 11 to 25, 2027 · next Feb 11
1 fee due Mar 24, 2027
The maintenance fee for Method of Preparing Irradiation Targets for Radioisotope Production and Irradiation Target (US 10,424,417) comes due Mar 24, 2027. Unpaid by Sep 24, 2027, it lapses early.
4 fees due Apr 8 to 17, 2027 · next Apr 8
1 fee due May 14, 2027
The maintenance fee for Equipment for Producing Nuclear Fuel Powder (US 11,817,224) comes due May 14, 2027. Unpaid by Nov 15, 2027, it lapses early.
2 fees due Jul 2 to 26, 2027 · next Jul 2
2 fees due Aug 11 to 18, 2027 · next Aug 11
1 fee due Sep 1, 2027
The maintenance fee for Apparatus for Automated Positioning of Eddy Current Test Probe (US 9,273,985) comes due Sep 1, 2027. Unpaid by Mar 1, 2028, it lapses early.
3 fees due Oct 2 to 28, 2027 · next Oct 2
1 fee due Nov 12, 2027
The maintenance fee for Method for Detecting a Defect on a Surface by Multidirectional Lighting and Associated Device (US 10,648,920) comes due Nov 12, 2027. Unpaid by May 12, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

7 of the patents on this record were granted since Aug 16, 2026
2 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 141 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Method and Device for Replacing Sleeves Lining Nuclear Reactor Pressure Vessel Tubes	2 in force	to Oct 2038
Method for Conditioning a Power-Generating Circulatory System of a Power Plant	2 in force	to Nov 2034
Apparatus for Automated Positioning of Eddy Current Test Probe	2 in force	to Jan 2032
Storage Container for Uranium Oxide Powder	1 in force	to Jan 2045
Floating Maintenance Platform for Nuclear Facility	1 in force	to Apr 2043

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,542,860	Method and Device for Detecting the Location of a Pulse-Type Mechanical Effect on a System Part In force Term ends Jan 10, 2027 · High confidence	In force	Term ends Jan 10, 2027	High confidence
US 7,684,951	Method and Device for Detecting a Pulse-Type Mechanical Effect on a System Part In force Term ends Mar 21, 2027 · High confidence	In force	Term ends Mar 21, 2027	High confidence
US 7,594,439	Method and Device for Ultrasonic Testing of a Workpiece Having an Uneven Surface In force Term ends Apr 27, 2027 · High confidence	In force	Term ends Apr 27, 2027	High confidence
US 7,779,526	Method for the Production of a Collecting Line for Detecting and Locating an Agent Discharging into the Environment of the Collecting Line in Case of Leakage In force Term ends Jan 16, 2028 · High confidence	In force	Term ends Jan 16, 2028	High confidence
US 9,116,084	Method and sampling system for taking sample from the atmosphere in the reactor containment of a nuclear plant In force Term ends Mar 3, 2028 · High confidence	In force	Term ends Mar 3, 2028	High confidence
US 8,371,025	Apparatus for Repairing a Damaged Area in an Underwater Wall Region of a Vessel or Pool In force Term ends Sep 23, 2029 · High confidence	In force	Term ends Sep 23, 2029	High confidence
US 8,353,990	Process for Chemically Decontaminating Radioactively Contaminated Surfaces of a Nuclear Plant Cooling System Using an Organic Acid Followed by an Anionic Surfactant In force Term ends Feb 17, 2030 · High confidence	In force	Term ends Feb 17, 2030	High confidence
US 8,360,229	Isolating Plant and Associated Isolating Method In force Term ends Jun 28, 2030 · High confidence	In force	Term ends Jun 28, 2030	High confidence
US 9,273,985	Apparatus for Automated Positioning of Eddy Current Test Probe held by Framatome Inc. In force Term ends Sep 16, 2030 · High confidence	In force	Term ends Sep 16, 2030	High confidence
US 10,636,131	Inspection Video Radiation Filter held by Framatome Inc. In force Term ends Apr 5, 2031 · Medium confidence	In force	Term ends Apr 5, 2031	Medium confidence

10 of 144 patents shown.

Pro members see all 144.

Pro members: see all 144 patents

Also on record, not counted in the 144: 1 patent in force now held by others · 116 patents ended · 45 applications pending · 33 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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