Circassia AB

9 patents currently held · Updated Nov 14, 2026

12 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.

Recorded as renamed to Niox AB (2025)

Previously recorded as Aerocrine AB (to 2017)

Ending by 2030

Jul 2027

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 Apr 8, 2027
The maintenance fee for Miniaturized fluid flow regulating device (US 10,433,766) comes due Apr 8, 2027. Unpaid by Oct 8, 2027, it lapses early.
1 fee due Oct 5, 2027
The maintenance fee for Miniaturised electrochemical sensor (US 9,304,100) comes due Oct 5, 2027. Unpaid by Apr 5, 2028, it lapses early.

Which patents, and when each one lapses · Pro

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 9 of 9

Patent	Title	Status	Expires	Confidence
US 7,611,671	Reduction of carbon monoxide interference in gaseous analyte detectors In force Term ends Jul 6, 2027 · From the USPTO record	In force	Term ends Jul 6, 2027	From the USPTO record
US 8,834,798	Analysis device In force Term ends May 14, 2030 · From the USPTO record	In force	Term ends May 14, 2030	From the USPTO record
US 8,206,311	Analyzer for nitric oxide in exhaled breath with multiple-use sensor In force Term ends Sep 25, 2030 · From the USPTO record	In force	Term ends Sep 25, 2030	From the USPTO record
US 8,424,562	Check Valve In force Term ends Feb 9, 2031 · High confidence	In force	Term ends Feb 9, 2031	High confidence
US 9,027,239	Method for Plugging a Hole In force Term ends May 28, 2031 · High confidence	In force	Term ends May 28, 2031	High confidence
US 8,932,230	Controlling flow of exhaled breath during analysis In force Term ends Feb 7, 2032 · From the USPTO record	In force	Term ends Feb 7, 2032	From the USPTO record
US 10,016,149	Handle Device and Breath Analysis Device In force Term ends May 1, 2034 · High confidence	In force	Term ends May 1, 2034	High confidence
US 9,304,100	Miniaturised electrochemical sensor In force Term ends Jul 24, 2034 · From the USPTO record	In force	Term ends Jul 24, 2034	From the USPTO record
US 10,433,766	Miniaturized fluid flow regulating device In force Term ends Oct 15, 2036 · From the USPTO record	In force	Term ends Oct 15, 2036	From the USPTO record

Also on record, not counted in the 9: 12 patents in force now held by others · 1 lapsed for an unpaid fee · 17 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.

2 no status recorded

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