Hill & Smith Limited

10 patents currently held · Updated Nov 15, 2026

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.

Recorded as renamed to Hill & Smith Infrastructure Limited (2026)

Ending by 2030

Dec 2026

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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 Jul 12, 2027
The maintenance fee for Road safety barrier (US 9,234,324) comes due Jul 12, 2027. Unpaid by Jan 12, 2028, it lapses early.
1 fee due Aug 13, 2027
The maintenance fee for Barrier System (US 11,898,313) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
1 fee due Sep 19, 2027
The maintenance fee for Beam connection device (US 11,933,003) comes due Sep 19, 2027. Unpaid by Mar 20, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted since Aug 17, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Showing 1 to 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,121,149	Posts for road safety barrier In force Term ends Dec 14, 2026 · From the USPTO record	In force	Term ends Dec 14, 2026	From the USPTO record
US 7,650,228	Internet Based Highway Traffic Advisory System In force Term ends Jan 25, 2027 · High confidence	In force	Term ends Jan 25, 2027	High confidence
US 8,061,926	Crash barrier beam In force Term ends Mar 17, 2028 · From the USPTO record	In force	Term ends Mar 17, 2028	From the USPTO record
US 9,458,584	Perimeter Security Barriers In force Term ends Mar 8, 2030 · High confidence	In force	Term ends Mar 8, 2030	High confidence
US 9,469,949	Road safety barrier In force Term ends Jun 29, 2031 · From the USPTO record	In force	Term ends Jun 29, 2031	From the USPTO record
US 9,234,324	Road safety barrier In force Term ends Aug 18, 2031 · From the USPTO record	In force	Term ends Aug 18, 2031	From the USPTO record
US 11,898,313	Barrier System In force Term ends Nov 11, 2038 · High confidence	In force	Term ends Nov 11, 2038	High confidence
US 11,459,797	Latch Mechanism for a Gate In force Term ends Jul 31, 2040 · High confidence	In force	Term ends Jul 31, 2040	High confidence
US 11,933,003	Beam connection device In force Term ends Jun 5, 2042 · From the USPTO record	In force	Term ends Jun 5, 2042	From the USPTO record
US 12,781,450	Crash Attenuator Assemblies for Decelerating Vehicles In force Term ends Aug 20, 2043 · High confidence	In force	Term ends Aug 20, 2043	High confidence

Also on record, not counted in the 10: 1 patent in force now held by others · 2 lapsed for an unpaid fee · 11 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

1 pending · 5 no status recorded

List them