Lapsed Jul 7, 2019 on the fee record · High confidence
20-year base term ends Jun 21, 2032
First maintenance fee unpaid; grace period ended.
Filed Aug 27, 2012 as application 13/595,335 · Granted Jul 7, 2015
Base term, 20 years from filing, plus 312 days of patent term adjustment (USPTO delay)
Today
Lapsed Jul 7, 2019
2012
2033
Clock starts
Jun 21, 2012
Jun 21, 2012
No longer in force
Jul 7, 2019
Jul 7, 2019
Granted
Jul 7, 2015
Jul 7, 2015
Term would have run to
Apr 29, 2033
Apr 29, 2033
base term
patent term adjustment
after the term ends
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
312
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
Its term would have run to Apr 29, 2033: its 20-year base term plus 312 days of term adjustment for prosecution delay. 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 Jun 21, 2012, when application 13/529,248, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2012) | Jun 21, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +312 days, USPTO patent term adjustment record | Apr 29, 2033 | 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 | 0 of 3 maintenance fees paid | lapsed Jul 7, 2019 | High confidence |
| Computed term end | The steps above, in order | Jul 7, 2019 | High confidence |
This family
| US 8,869,157 | In force May 2033 | May 2033 |
| US 8,996,533 | In force Jul 2033 | Jul 2033 |
| US 9,075,735 | this patent Jul 2019 | Jul 2019 |
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 |
|---|---|---|---|
| Oct 29, 2012 Reel 29204, frame 337 | Tomlinson, Alexander I; Cook, Brent Aaron; Canion, Rodney S | Breakingpoint Systems, Inc. | Assignment of Assignor's Interest |
| Jan 25, 2013 Reel 29698, frame 136 | Breakingpoint Systems, Inc. | Bank of America, N.A., as Administrative Agent | Security Agreement |
| Feb 2, 2015 Reel 34870, frame 598 | Bank of America, N.A., Resigning Administrative Agent | Silicon Valley Bank, as Successor Administrative Agent | Notice of Substitution of Administrative Agent |
| Apr 24, 2017 Reel 42126, frame 181 | Silicon Valley Bank, as Successor Administrative Agent | Breakingpoint Systems, Inc. | Release of Security Interest |
| Oct 19, 2017 Reel 43898, frame 980 | Breakingpoint Systems, Inc. | Keysight Technologies Singapore (Holdings) Pte. Ltd. | Assignment of Assignor's Interest |
| Oct 19, 2018 Reel 48225, frame 65 | Keysight Technologies Singapore (Holdings) Pte. Ltd. | Keysight Technologies Singapore (Sales) Pte. Ltd. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
The 312 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
50
later US patents cite this one
That is top 10% of utility patents granted in 2015 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.