The Patent Finder
US

Isolated Power Converter

US 7,468,649 In force
OverviewFamilyAssignmentsSources & methods

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

Collateral for a security interest recorded Apr 20, 2021 (NSF I LLC).

Term ends Mar 14, 2027 · High confidence

Filed Mar 14, 2007 as application 11/686,140 · Granted Dec 23, 2008
Base term, 20 years from filing
Today
20 years from filing
2007 2027
Clock starts
Mar 14, 2007
Term ends
Mar 14, 2027
Granted
Dec 23, 2008
base term 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
None
Term adjustment
No prosecution delay on this record.
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 is its 20-year base term, with no adjustment for 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 Mar 14, 2007, when this application, 11/686,140, was filedMar 14, 2027High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh 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 orderMar 14, 2027High confidence

This family

US 7,468,649this patent
Mar 2027
Mar 2027
US 8,502,520Lapsed on the fee record
Aug 2025
Aug 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
Mar 14, 2007
Reel 19011, frame 794
Chandrasekaran, SriramColdwatt, Inc.Assignment of Assignor's Interest
May 20, 2009
Reel 22712, frame 875
Coldwatt, Inc.Flextronics International USA, Inc.Merger
Apr 8, 2021
Reel 55879, frame 707
Flextronics International USA, Inc.Mypaq Holdings Ltd.Assignment of Assignor's Interest
Apr 20, 2021
Reel 55973, frame 892
Mypaq Holdings Ltd.NSF I LLCSecurity Interest
Jul 20, 2022
Reel 61266, frame 1
Coldwatt, Inc.Flextronics International USA, Inc.Conveyance by Dissolution of Coldwatt, Inc., Which Was Completed on 04-09-2012 per Attached Declaration. Conveyance Was Made to Coldwatt's Sole Stockholder, Flextronics International Usa, Inc. See Del. Code Ann. Tit. 8, § 281(B).

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.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited