62 patents currently held

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

The next term ends in Apr 2032. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Apr 2032

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

2026202720282029203020312032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 20442045

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

Composite Shaft US 11,815,133

Cited by 8 later US patents, top 10% of utility patents granted in 2023 in our data. Protection runs to 2041.

Ends Jan 2041 · High confidence Also notable

Connector for a Tubular Composite Shaft US 9,482,266

The most cited patent in this portfolio, cited by 25 later US patents, top 25% of utility patents granted in 2016 in our data. Protection runs to 2032.

Ends Apr 2032 · High confidence Also notable

Flexible Coupling US 10,415,648

Granted 2019. Computed term ends 2034.

Ends Feb 2034 · 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 13, 2026
The maintenance fee for Composite Connectors and Methods of Manufacturing the Same (US 11,673,301) comes due Dec 13, 2026. Unpaid by Jun 14, 2027, it lapses early.
1 fee due Jan 23, 2027
The maintenance fee for Electrical Isolator (US 10,361,017) comes due Jan 23, 2027. Unpaid by Jul 23, 2027, it lapses early.
2 fees due Mar 17 to 19, 2027 · next Mar 17
1 fee due Apr 24, 2027
The maintenance fee for Fibre Coating Apparatus (US 11,794,423) comes due Apr 24, 2027. Unpaid by Oct 25, 2027, it lapses early.
2 fees due May 14 to 26, 2027 · next May 14
3 fees due Jul 2 to 16, 2027 · next Jul 2
2 fees due Aug 6 to 20, 2027 · next Aug 6
1 fee due Sep 24, 2027
The maintenance fee for Composite Tubular Structure (US 10,598,200) comes due Sep 24, 2027. Unpaid by Mar 24, 2028, it lapses early.
1 fee due Oct 7, 2027
The maintenance fee for Connector (US 10,612,568) comes due Oct 7, 2027. Unpaid by Apr 7, 2028, it lapses early.
2 fees due Nov 7, 2027

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 52 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Flexible Coupling	3 in force	to Aug 2034
Composite Connectors and Methods of Manufacturing the Same	2 in force	to Mar 2042
Composite End Connections	2 in force	to Aug 2041
Transmission Shaft	2 in force	to Feb 2041
Composite Shaft	2 in force	to Jan 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,482,266	Connector for a Tubular Composite Shaft In force Term ends Apr 12, 2032 · High confidence	In force	Term ends Apr 12, 2032	High confidence
US 10,030,712	Torque Disc In force Term ends Oct 19, 2032 · High confidence	In force	Term ends Oct 19, 2032	High confidence
US 9,915,381	Composite Tube In force Term ends Jul 15, 2033 · High confidence	In force	Term ends Jul 15, 2033	High confidence
US 10,415,648	Flexible Coupling In force Term ends Feb 17, 2034 · High confidence	In force	Term ends Feb 17, 2034	High confidence
US 11,187,276	Flexible Coupling In force Term ends Feb 17, 2034 · High confidence	In force	Term ends Feb 17, 2034	High confidence
US 9,869,341	Internally Grooved Components In force Term ends Feb 23, 2034 · High confidence	In force	Term ends Feb 23, 2034	High confidence
US 12,006,986	An Assembly Including a Flexible Coupling In force Term ends Aug 7, 2034 · High confidence	In force	Term ends Aug 7, 2034	High confidence
US 9,765,929	Composite Materials In force Term ends Apr 14, 2035 · High confidence	In force	Term ends Apr 14, 2035	High confidence
US 10,138,945	Flexible Coupling In force Term ends Jul 31, 2035 · High confidence	In force	Term ends Jul 31, 2035	High confidence
US 10,184,509	Composite Tension/Compression Strut In force Term ends Nov 12, 2036 · High confidence	In force	Term ends Nov 12, 2036	High confidence

10 of 62 patents shown.

Pro members see all 62.

Pro members: see all 62 patents

Also on record, not counted in the 62: 20 applications pending · 13 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

Crompton Technology Group Limited