The Patent Finder
US

System and Method for a Distributed Crossbar Network Using a Plurality of Crossbars

US 7,908,422 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Mar 15, 2023 on the fee record · Medium confidence

Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.

Third maintenance fee unpaid; grace period ended.

Filed Jun 10, 2009 as application 12/481,628 · Granted Mar 15, 2011
Base term, 20 years from filing
Today
Lapsed Mar 15, 2023
2006 2026
Clock starts
Feb 2, 2006
No longer in force
Mar 15, 2023
Granted
Mar 15, 2011
Term would have run to
Feb 2, 2026
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.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
2 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.

Its term would have run to Feb 2, 2026: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Feb 2, 2006, when application 11/346,041, the earliest non-provisional in its chain, was filed (this one was filed Jun 10, 2009)Feb 2, 2026High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer on file (approved), reference document not resolvedno cap applied, and none guessedMedium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 3 maintenance fees paidlapsed Mar 15, 2023High confidence
Computed term endThe steps above, in orderMar 15, 2023Medium confidence

This family

US 7,568,063In force
Nov 2026
Nov 2026
US 7,908,422this patent
Mar 2023
Mar 2023
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
Nov 9, 2015
Reel 37079, frame 1
Hewlett-packard Development Company, L.p.Hewlett Packard Enterprise Development 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.

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