Also listed on Mu Dynamics, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Oct 21, 2025 (Wells Fargo Bank, National Association).
Term ends Oct 5, 2031 · High confidence
20-year base term ends Apr 27, 2031
Held by Viavi Solutions Licensing LLC
Filed Apr 27, 2011 as application 13/095,807 · Granted Jun 11, 2013
Base term plus 161 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Apr 27, 2011
Apr 27, 2011
Term ends
Oct 5, 2031
Oct 5, 2031
Granted
Jun 11, 2013
Jun 11, 2013
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
161
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 161 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.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Apr 27, 2011, when this application, 13/095,807, was filed | Apr 27, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +161 days, USPTO patent term adjustment record | Oct 5, 2031 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 5, 2031 | High confidence |
This family
| US 8,464,219 | this patent Oct 2031 | Oct 2031 |
| US 8,910,129 | Lapsed on the fee record Dec 2022 | Dec 2022 |
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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Apr 27, 2011 Reel 26190, frame 786 | Wilkerson, Brian | Mu Dynamics, Inc. | Assignment of Assignor's Interest |
| Jun 13, 2014 Reel 33099, frame 185 | Mu Dynamics, Inc. | Spirent Communications, Inc. | Assignment of Assignor's Interest |
| Oct 20, 2025 Reel 73121, frame 549 | Spirent Communications, Inc. | Viavi Solutions Licensing LLC | Assignment of Assignor's Interest |
| Oct 21, 2025 Reel 73189, frame 873 | Inertial Labs, Inc.; Viavi Solutions Inc.; Viavi Solutions Licensing LLC | Wells Fargo Bank, National Association, as Administrative Agent | Security Agreement |
| Nov 14, 2025 Reel 73571, frame 137 | Viavi Solutions Inc.; Viavi Solutions Licensing LLC; Inertial Labs, Inc. | Wells Fargo Bank, National Association, as Agent | Security Interest |
| May 28, 2026 Reel 75642, frame 381 | Wells Fargo Bank, National Association, as Administrative Agent | Inertial Labs, Inc.; Viavi Solutions Inc.; Viavi Solutions Licensing LLC | Release of Security Interest at Reel/Frame 73189/0873 |
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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Oct 2031
Term ends Oct 5, 2031. No further fees fall due before then
Note
The 161 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
17
later US patents cite this one
That is above the median of utility patents granted in 2013 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.