Also listed on Metaswitch Networks Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 18, 2030 · High confidence
20-year base term ended Sep 4, 2026
Held by Alianza, LLC
Filed Mar 3, 2008 as application 12/041,542 · Granted Dec 17, 2013
Base term plus 1291 days of patent term adjustment (USPTO delay)
Today
2006
2030
Clock starts
Sep 4, 2006
Sep 4, 2006
Term ends
Mar 18, 2030
Mar 18, 2030
Granted
Dec 17, 2013
Dec 17, 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
1,291
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 1291 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 Sep 4, 2006, when application PCT/EP2006/065985, the earliest non-provisional in its chain, was filed (this one was filed Mar 3, 2008) | Sep 4, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1291 days, USPTO patent term adjustment record | Mar 18, 2030 | 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 | Mar 18, 2030 | High confidence |
This family
| US 8,611,522 | this patent Mar 2030 | Mar 2030 |
1 of 2 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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Dec 15, 2010 Reel 25503, frame 25 | Mairs, Chris; Brittain, Paul; Taylor, Martin | Data Connection Limited | Assignment of Assignor's Interest |
| Nov 23, 2011 Reel 27281, frame 456 | Data Connection Limited | Metaswitch Networks Ltd. | Change of Name |
| May 6, 2025 Reel 71191, frame 228 | Alianza, Inc.; Metaswitch Networks Ltd. | Wells Fargo Bank, National Association | Security Interest |
| May 13, 2026 Reel 75578, frame 155 | Metaswitch Networks Ltd. | Microsoft Technology Licensing, LLC | Assignment of Assignor's Interest |
| May 13, 2026 Reel 75835, frame 639 | Metaswitch Limited | Microsoft Technology Licensing, LLC | Assignment of Assignor's Interest |
| May 13, 2026 Reel 75645, frame 892 | Microsoft Technology Licensing, LLC | Alianza, Inc. | Assignment of Assignor's Interest |
| May 13, 2026 Reel 75646, frame 37 | Alianza, Inc. | Alianza, LLC | Change of Name |
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.
What's changing
Mar 2030
Term ends Mar 18, 2030. No further fees fall due before then
Note
The 1291 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
9
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.