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US

Systems and Methods for Input/Output Isolation

US 8,250,262 In force
OverviewFamilyAssignmentsSources & methods

Also listed on Ringcube Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Collateral for a security interest recorded Sep 30, 2022 (Wilmington Trust, National Association).

Term ends Jun 11, 2030 · High confidence

Filed Jan 5, 2010 as application 12/652,264 · Granted Aug 21, 2012
Base term plus 157 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2010 2030
Clock starts
Jan 5, 2010
Term ends
Jun 11, 2030
Granted
Aug 21, 2012
base term patent term adjustment fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
157
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term runs 157 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Jan 5, 2010, when this application, 12/652,264, was filedJan 5, 2030High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+157 days, USPTO patent term adjustment recordJun 11, 2030High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderJun 11, 2030High confidence

This family

US 8,250,262this patent
Jun 2030
Jun 2030
US 8,583,837Lapsed on the fee record
Nov 2025
Nov 2025
The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Jul 20, 2010
Reel 24715, frame 183
Larkin, Michael; Thakkar, GaurangRingcube Technologies, Inc.Assignment of Assignor's Interest
Jan 5, 2012
Reel 27486, frame 299
Ringcube Technologies, Inc.Citrix Systems, Inc.Merger
Sep 30, 2022
Reel 62079, frame 1
Citrix Systems, Inc.Wilmington Trust, National AssociationSecurity Interest
Oct 7, 2022
Reel 62112, frame 262
Tibco Software Inc.; Citrix Systems, Inc.Bank of America, N.A., as Collateral AgentPatent Security Agreement
Oct 7, 2022
Reel 62113, frame 1
Tibco Software Inc.; Citrix Systems, Inc.Goldman Sachs Bank USA, as Collateral AgentSecond Lien Patent Security Agreement
Oct 7, 2022
Reel 62113, frame 470
Tibco Software Inc.; Citrix Systems, Inc.Wilmington Trust, National Association, as Notes Collateral AgentPatent Security Agreement
Apr 14, 2023
Reel 63339, frame 525
Goldman Sachs Bank USA, as Collateral AgentCitrix Systems, Inc.; Cloud Software Group, Inc. (F/K/A Tibco Software Inc.)Release and Reassignment of Security Interest in Patent (Reel/Frame 062113/0001)
Apr 14, 2023
Reel 63340, frame 164
Cloud Software Group, Inc. (F/K/A Tibco Software Inc.); Citrix Systems, Inc.Wilmington Trust, National Association, as Notes Collateral AgentPatent Security Agreement
Apr 14, 2023
reel/frame not recorded
Goldman Sachs Bank USA, as Collateral AgentCitrix Systems, Inc.Release and Reassignment of Security Interest in Patent (Reel/Frame 062113/0001)
Apr 14, 2023
reel/frame not recorded
Goldman Sachs Bank USA, as Collateral AgentCloud Software Group, Inc. (F/K/A Tibco Software Inc.)Release and Reassignment of Security Interest in Patent (Reel/Frame 062113/0001)
May 24, 2024
Reel 67662, frame 568
Cloud Software Group, Inc. (F/K/A Tibco Software Inc.); Citrix Systems, Inc.Wilmington Trust, National Association, as Notes Collateral AgentSecurity Interest
Aug 15, 2025
Reel 72488, frame 172
Cloud Software Group, Inc.; Citrix Systems, Inc.Wilmington Trust, National Association, as Notes Collateral AgentPatent Security Agreement

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

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