Also listed on Wombat Security Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Dec 8, 2025 (U.S. Bank Trust Company, National Association).
Term ends Feb 11, 2035 · High confidence
20-year base term ends Feb 11, 2035
Held by Proofpoint, Inc.
Filed Jun 17, 2016 as application 15/185,228 · Granted Nov 7, 2017
Base term, 20 years from filing
Today
2015
2035
Clock starts
Feb 11, 2015
Feb 11, 2015
Term ends
Feb 11, 2035
Feb 11, 2035
Granted
Nov 7, 2017
Nov 7, 2017
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,398,029, to Feb 11, 2035. The term already ends on or before that date, so the cap shortened nothing.
2 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.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. 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 Feb 11, 2015, when application 14/619,520, the earliest non-provisional in its chain, was filed (this one was filed Jun 17, 2016) | Feb 11, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,398,029) | resolves to Feb 11, 2035, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 11, 2035 | High confidence |
This family
| US 9,398,029 | In force Feb 2035 | Feb 2035 |
| US 9,813,454 | this patent Feb 2035 | Feb 2035 |
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 |
|---|---|---|---|
| Jan 17, 2018 Reel 44640, frame 360 | Wombat Security Technologies, Inc. | Bridge Bank, National Association | Security Interest |
| Mar 19, 2019 Reel 48632, frame 31 | Wombat Security Technologies, Inc. | Proofpoint, Inc. | Assignment of Assignor's Interest |
| Apr 15, 2021 Reel 55930, frame 677 | Sadeh-koniecpol, Norman; Wescoe, Kurt Frederick; Ferrara, Joseph A. | Wombat Security Technologies, Inc. | Assignment of Assignor's Interest |
| May 24, 2021 Reel 56327, frame 658 | Western Alliance Bank (D/B/A Bridge Bank) | Wombat Security Technologies, Inc. | Release of Security Interest |
| Aug 31, 2021 Reel 57389, frame 615 | Proofpoint, Inc. | Goldman Sachs Bank USA, as Collateral Agent | First Lien Intellectual Property Security Agreement |
| Aug 31, 2021 Reel 57389, frame 642 | Proofpoint, Inc. | Goldman Sachs Bank USA, as Collateral Agent | Second Lien Intellectual Property Security Agreement |
| Mar 21, 2024 Reel 66865, frame 648 | Goldman Sachs Bank USA, as Agent | Proofpoint, Inc. | Release of Second Lien Security Interest in Intellectual Property |
| Dec 8, 2025 Reel 73889, frame 677 | Proofpoint, Inc. | U.S. Bank Trust Company, National Association, as Collateral Agent | Second Lien Intellectual Property Security Agreement |
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
Feb 2035
Term ends Feb 11, 2035. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,398,029, ends no earlier than this term, so it caps nothing.
Citations
209
later US patents cite this one
That is top 1% of utility patents granted in 2017 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.