Enraf B.V.

10 patents currently held · Updated Nov 14, 2026

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

Ending by 2030

Apr 2028

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

Fee deadlines

No maintenance fee falls due on this company's record before Nov 14, 2027.

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

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 8,251,081	Device for metering fluids In force Term ends Apr 15, 2028 · From the USPTO record	In force	Term ends Apr 15, 2028	From the USPTO record
US 8,319,680	Radar liquid level detection using stepped frequency pulses In force Term ends Dec 2, 2028 · From the USPTO record	In force	Term ends Dec 2, 2028	From the USPTO record
US 8,186,214	Method and Device for Determining the Level L of a Liquid Within a Specified Measuring Range by Means of Radar Signals Transmitted to the Liquid Surface and Radar Signals Reflected from the Liquid Surface In force Term ends Jan 1, 2029 · High confidence	In force	Term ends Jan 1, 2029	High confidence
US 8,159,358	Apparatus and Method for Storage Tank Hatch Monitoring in an Inventory Management System In force Term ends Oct 13, 2029 · High confidence	In force	Term ends Oct 13, 2029	High confidence
US 8,234,084	Apparatus and method for automatic gauge reading in an inventory control and management system In force Term ends Apr 23, 2030 · From the USPTO record	In force	Term ends Apr 23, 2030	From the USPTO record
US 8,631,696	Apparatus and method for monitoring tanks in an inventory management system In force Term ends May 20, 2030 · From the USPTO record	In force	Term ends May 20, 2030	From the USPTO record
US 8,224,594	Apparatus and method for dynamic peak detection, identification, and tracking in level gauging applications In force Term ends Jul 7, 2030 · From the USPTO record	In force	Term ends Jul 7, 2030	From the USPTO record
US 8,271,212	Method for robust gauging accuracy for level gauges under mismatch and large opening effects in stillpipes and related apparatus In force Term ends Aug 21, 2030 · From the USPTO record	In force	Term ends Aug 21, 2030	From the USPTO record
US 8,315,825	Method and apparatus for adaptively handling level measurements under unstable conditions In force Term ends Nov 18, 2030 · From the USPTO record	In force	Term ends Nov 18, 2030	From the USPTO record
US 8,659,472	Method and apparatus for highly accurate higher frequency signal generation and related level gauge In force Term ends Jun 20, 2031 · From the USPTO record	In force	Term ends Jun 20, 2031	From the USPTO record

Also on record, not counted in the 10: 2 lapsed for an unpaid fee. 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 no status recorded

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