Term ends Jan 9, 2027 · High confidence
20-year base term ended Mar 24, 2025
Filed Mar 24, 2005 as application 11/089,845 · Granted Aug 19, 2008
Base term plus 656 days of patent term adjustment (USPTO delay)
Today
2005
2027
Clock starts
Mar 24, 2005
Mar 24, 2005
Term ends
Jan 9, 2027
Jan 9, 2027
Granted
Aug 19, 2008
Aug 19, 2008
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
656
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.
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 runs 656 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 Mar 24, 2005, when this application, 11/089,845, was filed | Mar 24, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +656 days, USPTO patent term adjustment record | Jan 9, 2027 | 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 | Jan 9, 2027 | High confidence |
This family
| US 7,414,975 | this patent Jan 2027 | Jan 2027 |
| US 8,121,148 | Lapsed on the fee record Feb 2020 | Feb 2020 |
| US 7,827,295 | Term ended Aug 2025 | Aug 2025 |
| US 8,649,395 | Term 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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Apr 28, 2005 Reel 15960, frame 692 | Olderdissen, Jan | Ixia | Assignment of Assignor's Interest |
| Jan 25, 2013 Reel 29698, frame 60 | Ixia | Bank of America, N.A., as Administrative Agent | Security Agreement |
| Feb 2, 2015 Reel 34870, frame 598 | Bank of America, N.A., Resigning Administrative Agent | Silicon Valley Bank, as Successor Administrative Agent | Notice of Substitution of Administrative Agent |
| Apr 26, 2017 Reel 42335, frame 465 | Silicon Valley Bank, as Successor Administrative Agent | Ixia | Release of Security Interest |
| Oct 18, 2017 Reel 44222, frame 695 | Ixia | Keysight Technologies Singapore (Holdings) Pte. Ltd. | Assignment of Assignor's Interest |
| Oct 19, 2018 Reel 48225, frame 65 | Keysight Technologies Singapore (Holdings) Pte. Ltd. | Keysight Technologies Singapore (Sales) Pte. Ltd. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jan 2027
Term ends Jan 9, 2027. No further fees fall due before then
Note
The 656 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
47
later US patents cite this one
That is top 25% of utility patents granted in 2008 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.