Lapsed Aug 11, 2017 on the fee record · Medium confidence
20-year base term ended Oct 31, 2021
Why Medium: A parent in the chain could not be resolved.
Second maintenance fee unpaid; grace period ended.
Held by Ericsson AB
Filed Oct 31, 2002 as application 10/285,937 · Granted Aug 11, 2009
Base term, 20 years from filing, plus 1379 days of patent term adjustment (USPTO delay)
Today
Lapsed Aug 11, 2017
2001
2026
Clock starts
Oct 31, 2001
Oct 31, 2001
No longer in force
Aug 11, 2017
Aug 11, 2017
Granted
Aug 11, 2009
Aug 11, 2009
Term would have run to
Aug 10, 2025
Aug 10, 2025
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
1,379
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
10
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Aug 10, 2025: its 20-year base term plus 1379 days of term adjustment for prosecution delay. Confidence: Medium. 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 Oct 31, 2001, when application 09/999,542, the earliest non-provisional in its chain, was filed (this one was filed Oct 31, 2002); a parent in its chain could not be resolved (the next row) | Oct 31, 2021 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +1379 days, USPTO patent term adjustment record | Aug 10, 2025 | 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 | 1 of 3 maintenance fees paid | lapsed Aug 11, 2017 | High confidence |
| Computed term end | The steps above, in order | Aug 11, 2017 | Medium confidence |
This family
| US 7,130,263 | Lapsed on the fee record Oct 2018 | Oct 2018 |
| US 7,573,814 | this patent Aug 2017 | Aug 2017 |
| US 7,477,642 | In force Nov 2026 | Nov 2026 |
| US 8,554,949 | Lapsed on the fee record Oct 2021 | Oct 2021 |
| US 8,588,742 | Lapsed on the fee record Nov 2025 | Nov 2025 |
| US 8,599,849 | Term ended Oct 2026 | Oct 2026 |
| US 9,350,646 | Term ended no later than Aug 2025 | no later than Aug 2025 |
| US 9,860,163 | Term ended Jan 2025 | Jan 2025 |
8 of 10 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 |
|---|---|---|---|
| Feb 20, 2004 Reel 14992, frame 228 | Luft, Siegfried; Meehan, Thomas; Neufeld, Gerald W.; Williams, Simon | Redback Networks Inc. | Assignment of Assignor's Interest |
| Apr 7, 2004 Reel 14499, frame 957 | Redback Networks Inc. | Silicon Valley Bank | Security Agreement |
| Feb 26, 2010 Reel 24002, frame 363 | Redback Networks Inc. | Ericsson AB | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 1379 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2009 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.