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Impedance Based Apparatuses and Methods for Analyzing Cells and Particles

US 7,459,303 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended Sep 29, 2025 · High confidence

Filed Nov 10, 2003 as application 10/705,615 · Granted Dec 2, 2008
Base term plus 689 days of patent term adjustment (USPTO delay)
Today
20 years from filing
Term ended Sep 29, 2025
2003 2026
Clock starts
Nov 10, 2003
Term ended
Sep 29, 2025
Granted
Dec 2, 2008
base term patent term adjustment after the term ends fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
689
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.
44
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 689 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 Nov 10, 2003, when this application, 10/705,615, was filedNov 10, 2023High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+689 days, USPTO patent term adjustment recordSep 29, 2025High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidterm endedHigh confidence
Computed term endThe steps above, in orderSep 29, 2025High confidence

This family

Application PCT/US2003/022557PCT application
no patent term
no patent term
Application PCT/US2003/022537PCT application
no patent term
no patent term
US 7,470,533Term ended
Jan 2025
Jan 2025
US 7,459,303this patent
Sep 2025
Sep 2025
US 7,192,752Term ended
Nov 2023
Nov 2023
Application PCT/US2004/037696PCT application
no patent term
no patent term
US 7,560,269Term ended
Oct 2025
Oct 2025
Application PCT/US2005/004481PCT application
no patent term
no patent term
8 of 44 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
Apr 19, 2004
Reel 15235, frame 25
Wang, Xiaobo; Xu, XiaoAcea BiosciencesAssignment of Assignor's Interest
Feb 25, 2021
Reel 55409, frame 874
Acea Biosciences, Inc.Agilent Technologies, Inc.Assignment 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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