Virtuallogix S.A.

9 patents currently held · Updated Nov 14, 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.

Ending by 2030

Mar 2028

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 Jan 28, 2027
The maintenance fee for Method of managing virtual machines using a virtual machine monitor (US 9,092,251) comes due Jan 28, 2027. Unpaid by Jul 28, 2027, it lapses early.
1 fee due Mar 1, 2027
The maintenance fee for Enabling multiple operating systems to run concurrently using barrier task priority (US 9,122,521) comes due Mar 1, 2027. Unpaid by Sep 1, 2027, 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 8,024,742	Common program for switching between operation systems is executed in context of the high priority operating system when invoked by the high priority OS In force Term ends Mar 15, 2028 · From the USPTO record	In force	Term ends Mar 15, 2028	From the USPTO record
US 8,201,170	Operating systems are executed on common program and interrupt service routine of low priority OS is modified to response to interrupts from common program only In force Term ends Apr 21, 2028 · From the USPTO record	In force	Term ends Apr 21, 2028	From the USPTO record
US 8,612,992	Operating systems In force Term ends May 21, 2028 · From the USPTO record	In force	Term ends May 21, 2028	From the USPTO record
US 9,619,279	Operating systems sharing supervisor address space with same virtual to physical mapping for supervisor address space using same translation formula with different translation tree In force Term ends May 24, 2028 · From the USPTO record	In force	Term ends May 24, 2028	From the USPTO record
US 8,341,630	Load balancing in a data processing system having physical and virtual CPUs In force Term ends Dec 3, 2030 · From the USPTO record	In force	Term ends Dec 3, 2030	From the USPTO record
US 8,996,864	System for enabling multiple execution environments to share a device In force Term ends Dec 21, 2030 · From the USPTO record	In force	Term ends Dec 21, 2030	From the USPTO record
US 9,122,521	Enabling multiple operating systems to run concurrently using barrier task priority In force Term ends Jan 22, 2031 · From the USPTO record	In force	Term ends Jan 22, 2031	From the USPTO record
US 9,092,251	Method of managing virtual machines using a virtual machine monitor In force Term ends Jun 3, 2031 · From the USPTO record	In force	Term ends Jun 3, 2031	From the USPTO record
US 8,918,788	Scheduling virtual CPU based on priority calculated using time statistics In force Term ends Feb 15, 2033 · From the USPTO record	In force	Term ends Feb 15, 2033	From the USPTO record

Also on record, not counted in the 9: 1 patent in force now held by others · 1 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

Every application published under this name has become a patent.