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Method for Enhancing Pulse Oximetry Calculations in the Presence of Correlated Artifacts

US 8,818,475 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended Mar 3, 2025 · Medium confidence

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,423,109), so the cap could be lower.

USPTO later recorded it as expired for non-payment on Sep 28, 2026.

Held by Covidien LP
Filed Mar 28, 2013 as application 13/852,505 · Granted Aug 26, 2014
Base term, 20 years from filing
Today
20 years from filing
Term ended Mar 3, 2025
2005 2026
Clock starts
Mar 3, 2005
Term ended
Mar 3, 2025
Granted
Aug 26, 2014
base term after the term ends 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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,392,075, US 8,423,109, to Mar 3, 2025. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
4
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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: Medium. 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 3, 2005, when application 11/072,682, the earliest non-provisional in its chain, was filed (this one was filed Mar 28, 2013)Mar 3, 2025High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 7,392,075, US 8,423,109)resolves to Mar 3, 2025, no earlier than this term, so no changeMedium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 2 maintenance fees paidterm endedHigh confidence
USPTO status recordRecorded as expired for non-payment on Sep 28, 2026, after the term endedno changeHigh confidence
Computed term endThe steps above, in orderMar 3, 2025Medium confidence

This family

US 7,392,075In force
Nov 2026
Nov 2026
US 8,423,109Lapsed on the fee record
Apr 2025
Apr 2025
US 8,818,475this patent
Mar 2025
Mar 2025
US 9,351,674Term ended
Mar 2025
Mar 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
Oct 15, 2013
Reel 31410, frame 248
Baker, Clark R.., JR.Covidien LPAssignment of Assignor's Interest

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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