Silentium Ltd.

14 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

Feb 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 Jun 12, 2027
The maintenance fee for Apparatus, system and method of sound control (US 11,842,121) comes due Jun 12, 2027. Unpaid by Dec 13, 2027, it lapses early.
1 fee due Jul 2, 2027
The maintenance fee for Apparatus, System, and Method of Acoustic Feedback (AFB) Mitigation (US 11,863,930) comes due Jul 2, 2027. Unpaid by Jan 3, 2028, it lapses early.
1 fee due Sep 19, 2027
The maintenance fee for Apparatus, System, and Method of Active Acoustic Control (AAC) (US 11,935,513) comes due Sep 19, 2027. Unpaid by Mar 20, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended since Aug 16, 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.

Patent	Title	Status	Expires	Confidence
US 7,869,607	Quiet active fan for servers chassis In force Term ends Feb 19, 2027 · From the USPTO record	In force	Term ends Feb 19, 2027	From the USPTO record
US 9,928,824	Apparatus, system and method of controlling noise within a noise-controlled volume In force Term ends May 10, 2032 · From the USPTO record	In force	Term ends May 10, 2032	From the USPTO record
US 9,431,001	Device, system and method of noise control In force Term ends Feb 10, 2035 · From the USPTO record	In force	Term ends Feb 10, 2035	From the USPTO record
US 11,842,121	Apparatus, system and method of sound control In force Term ends Jan 5, 2040 · From the USPTO record	In force	Term ends Jan 5, 2040	From the USPTO record
US 12,271,657	Apparatus, system and method of sound control In force Term ends Jan 5, 2040 · From the USPTO record	In force	Term ends Jan 5, 2040	From the USPTO record
US 11,385,859	Apparatus, system and method of sound control In force Term ends Feb 12, 2040 · From the USPTO record	In force	Term ends Feb 12, 2040	From the USPTO record
US 11,034,211	Apparatus, System and Method of Active Noise Control (ANC) Based on Heating, Ventilation and Air Conditioning (HVAC) Configuration In force Term ends Oct 26, 2040 · High confidence	In force	Term ends Oct 26, 2040	High confidence
US 11,935,513	Apparatus, System, and Method of Active Acoustic Control (AAC) In force Term ends Oct 26, 2040 · High confidence	In force	Term ends Oct 26, 2040	High confidence
US 12,070,986	Apparatus, System and Method of Active Noise Control (ANC) in a Vehicle In force Term ends Oct 26, 2040 · Low confidence	In force	Term ends Oct 26, 2040	Low confidence
US 11,451,915	Apparatus, System, and Method of Testing an Acoustic Device In force Term ends Nov 4, 2041 · High confidence	In force	Term ends Nov 4, 2041	High confidence

10 of 14 patents shown.

Pro members see all 14.

Pro members: see all 14 patents

Also on record, not counted in the 14: 1 lapsed for an unpaid fee · 4 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.

4 pending · 4 no status recorded

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