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US

Pulse Width Modulation Apparatus and Apparatus for Driving Light Source Having the Same

US 7,843,142 In force
OverviewFamilyAssignmentsSources & methods

Term ends May 15, 2028 · High confidence

Held by MVRX, Inc.
Filed Jan 31, 2008 as application 11/997,493 · Granted Nov 30, 2010
Base term plus 394 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2007 2028
Clock starts
Apr 17, 2007
Term ends
May 15, 2028
Granted
Nov 30, 2010
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
394
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 394 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 Apr 17, 2007, when application PCT/KR2007/001856, the earliest non-provisional in its chain, was filed (this one was filed Jan 31, 2008)Apr 17, 2027High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+394 days, USPTO patent term adjustment recordMay 15, 2028High 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 orderMay 15, 2028High confidence

This family

US 7,843,142this patent
May 2028
May 2028
1 of 2 applications in this family shown, earliest filings first. 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
Feb 12, 2008
Reel 20493, frame 503
Kim, Taek Soo; Kim, Hyun SikLG Innotek Co., Ltd.Assignment of Assignor's Interest
Dec 18, 2009
Reel 23699, frame 672
Ample Medical, Inc.Venture Lending & Leasing IV, Inc.; Venture Lending & Leasing V, Inc.Patent Transfer Statement (Under Uniform Commercial Code Section 9-619)
Dec 18, 2009
reel/frame not recorded
Ample Medical, Inc.Venture Lending & Leasing IV, Inc.Patent Transfer Statement (Under Uniform Commercial Code Section 9-619)
Dec 18, 2009
reel/frame not recorded
Ample Medical, Inc.Venture Lending & Leasing V, Inc.Patent Transfer Statement (Under Uniform Commercial Code Section 9-619)
Jan 29, 2010
Reel 23882, frame 30
Venture Lending & Leasing IV, Inc.; Venture Lending & Leasing V, Inc.MVRX, Inc.Bill of Sale

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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