Term ended Apr 24, 2025 · High confidence
20-year base term ended May 28, 2024
No current holder resolved from the recorded chain.
Filed Oct 20, 2010 as application 12/908,559 · Granted Oct 15, 2013
Base term plus 331 days of patent term adjustment (USPTO delay)
Today
Term ended Apr 24, 2025
2004
2026
Clock starts
May 28, 2004
May 28, 2004
Term ended
Apr 24, 2025
Apr 24, 2025
Granted
Oct 15, 2013
Oct 15, 2013
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
331
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 7,586,920, to Apr 24, 2025. The term already ends on or before that date, so the cap shortened nothing.
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.
3
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 331 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. All three maintenance fees were paid, so no fee lapse ended it. 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 May 28, 2004, when application 10/857,349, the earliest non-provisional in its chain, was filed (this one was filed Oct 20, 2010) | May 28, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +331 days, USPTO patent term adjustment record | Apr 24, 2025 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,586,920) | resolves to Apr 24, 2025, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Apr 24, 2025 | High confidence |
This family
| US 7,586,920 | In force Jun 2028 | Jun 2028 |
| US 7,843,939 | Term ended Jun 2024 | Jun 2024 |
| US 8,559,440 | this patent Apr 2025 | Apr 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 |
|---|---|---|---|
| Jul 29, 2013 Reel 30899, frame 597 | Calix, Inc. | Bank of America, N.A., as Administrative Agent | Security Agreement |
| Aug 9, 2017 Reel 43495, frame 424 | Calix, Inc. | Silicon Valley Bank | Security Interest |
| Aug 9, 2017 Reel 43494, frame 549 | Bank of America, N.A., as Administrative Agent for Lenders | Calix, Inc. | Release of Security Interest |
| Jan 27, 2020 Reel 51714, frame 883 | Silicon Valley Bank | Calix, Inc. | Release of Security Interest in Intellectual Property |
| Jan 28, 2020 Reel 51719, frame 348 | Calix, Inc. | Bank of America, N.A., as Agent | Security Interest |
| Apr 18, 2022 Reel 59802, frame 579 | Bank Of America, N.a. | Calix, Inc. | Release of Security Interest |
| May 11, 2022 Reel 59929, frame 453 | Bank Of America, N.a. | Calix, Inc. | Release of Security 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.
What's changing
Note
The 331 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 7,586,920, ends no earlier than this term, so it caps nothing.
Citations
3
later US patents cite this one
That is below 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.