Also listed on Packet Design Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 4, 2027 · High confidence
20-year base term ended Sep 6, 2026
Held by Ciena Corporation
Filed Sep 6, 2006 as application 11/517,071 · Granted Sep 25, 2012
Base term plus 332 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Sep 6, 2006
Sep 6, 2006
Term ends
Aug 4, 2027
Aug 4, 2027
Granted
Sep 25, 2012
Sep 25, 2012
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
332
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.
This patent's term runs 332 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 6, 2006, when this application, 11/517,071, was filed | Sep 6, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +332 days, USPTO patent term adjustment record | Aug 4, 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 | Aug 4, 2027 | High confidence |
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 29, 2006 Reel 18741, frame 99 | Casner, Stephen L.; Poduri, Kedar; Alonso, Rodrigo G.; Alaettinoglu, Cengiz; Jacobson, Van | Packet Design, Inc. | Assignment of Assignor's Interest |
| Mar 26, 2013 Reel 30089, frame 810 | Packet Design, Inc. | PD Acquisition, LLC | Assignment of Assignor's Interest |
| Mar 26, 2013 Reel 30091, frame 880 | PD Acquisition, LLC | Packet Design, LLC | Change of Name |
| Sep 10, 2014 Reel 33713, frame 276 | Packet Design, LLC | Comerica Bank | Security Interest |
| Jul 2, 2018 Reel 46464, frame 226 | Comerica Bank | Packet Design, LLC | Release of Security Interest at Reel 033713 / Frame 0276 |
| Jul 13, 2018 Reel 46342, frame 761 | Packet Design, LLC | Ciena Corporation | Merger |
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
Aug 2027
Term ends Aug 4, 2027. No further fees fall due before then
Note
The 332 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
13
later US patents cite this one
That is above the median of utility patents granted in 2012 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.