Collateral for a security interest recorded Nov 4, 2024 (Wilmington Trust, National Association).
Term ended Nov 12, 2026 · High confidence
20-year base term ended Dec 20, 2025
Held by Level 3 Communications, LLC
Filed Dec 31, 2010 as application 12/983,154 · Granted Dec 16, 2014
Base term plus 327 days of patent term adjustment (USPTO delay)
Today
Term ended Nov 12, 2026
2005
2026
Clock starts
Dec 20, 2005
Dec 20, 2005
Term ended
Nov 12, 2026
Nov 12, 2026
Granted
Dec 16, 2014
Dec 16, 2014
base term
patent term adjustment
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
327
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,864,710, to Nov 12, 2026. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. 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 327 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Dec 20, 2005, when application 11/312,949, the earliest non-provisional in its chain, was filed (this one was filed Dec 31, 2010) | Dec 20, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +327 days, USPTO patent term adjustment record | Nov 12, 2026 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,864,710) | resolves to Nov 12, 2026, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Nov 12, 2026 | High confidence |
This family
| US 7,864,710 | In force Aug 2027 | Aug 2027 |
| US 8,913,602 | this patent Nov 2026 | Nov 2026 |
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 31, 2010 Reel 25570, frame 347 | Wang, Jin-gen | Level 3 Communications, Inc. | Assignment of Assignor's Interest |
| Dec 31, 2010 Reel 25570, frame 404 | Level 3 Communications, Inc. | Level 3 Communications, LLC | Assignment of Assignor's Interest |
| Nov 4, 2024 Reel 69295, frame 749 | Level 3 Communications, LLC; Global Crossing Telecommunications, Inc. | Wilmington Trust, National Association, as Collateral Agent | Notice of Grant of Security Interest in Intellectual Property (Second Lien) |
| Nov 4, 2024 Reel 69295, frame 858 | Level 3 Communications, LLC; Global Crossing Telecommunications, Inc. | Wilmington Trust, National Association, as Collateral Agent | Notice of Grant of Security Interest in Intellectual Property (First Lien) |
| Jun 12, 2026 Reel 75738, frame 427 | Wilmington Trust, National Association, as Retiring Collateral Agent | U.S. Bank Trust Company, National Association, as Successor Collateral Agent | Assignment of First Lien Security Interest in Patent Collateral Recorded at R/F 069295/0858 |
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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Alerts on its grants, lapses and transfers.
What's changing
Note
The 327 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,864,710, ends no earlier than this term, so it caps nothing.
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2014 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.