Also listed on Cloudmark, 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 Apr 30, 2033 · High confidence
20-year base term ends Apr 30, 2033
Held by Proofpoint, Inc.
Filed Mar 30, 2017 as application 15/474,257 · Granted Oct 15, 2019
Base term, 20 years from filing
Today
2013
2033
Clock starts
Apr 30, 2013
Apr 30, 2013
Term ends
Apr 30, 2033
Apr 30, 2033
Granted
Oct 15, 2019
Oct 15, 2019
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 9,634,970, to Apr 30, 2033. The term already ends on or before that date, so the cap shortened nothing.
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.
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 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. 1 of 3 maintenance fees is 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 Apr 30, 2013, when application 13/874,376, the earliest non-provisional in its chain, was filed (this one was filed Mar 30, 2017) | Apr 30, 2033 | 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 9,634,970) | resolves to Apr 30, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 30, 2033 | High confidence |
This family
| US 9,634,970 | In force Jan 2034 | Jan 2034 |
| Application PCT/US2014/035917 | PCT application no patent term | no patent term |
| US 10,447,634 | this patent Apr 2033 | Apr 2033 |
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 |
|---|---|---|---|
| Mar 30, 2017 Reel 41798, frame 617 | Stemm, Mark | Cloudmark, Inc. | Assignment of Assignor's Interest |
| May 17, 2018 Reel 46182, frame 661 | Cloudmark, Inc. | Cloudmark LLC | Change of Name |
| May 17, 2018 Reel 45836, frame 690 | Cloudmark LLC | Proofpoint, Inc. | Assignment of Assignor's 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.
What's changing
Apr 2033
Term ends Apr 30, 2033. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,634,970, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2019 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.