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 Aug 28, 2035 · High confidence
20-year base term ends Oct 7, 2034
Held by Proofpoint, Inc.
Filed Oct 7, 2014 as application 14/508,987 · Granted Aug 8, 2017
Base term plus 325 days of patent term adjustment (USPTO delay)
Today
2014
2035
Clock starts
Oct 7, 2014
Oct 7, 2014
Term ends
Aug 28, 2035
Aug 28, 2035
Granted
Aug 8, 2017
Aug 8, 2017
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
325
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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 runs 325 days past its 20-year base term on prosecution delay. 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 Oct 7, 2014, when this application, 14/508,987, was filed | Oct 7, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +325 days, USPTO patent term adjustment record | Aug 28, 2035 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 28, 2035 | High confidence |
This family
| US 9,729,413 | this patent Aug 2035 | Aug 2035 |
| Application PCT/US2015/053957 | PCT application no patent term | no patent term |
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 7, 2014 Reel 33906, frame 751 | Cook, Neil; Lemarié, Olivier; Stemm, Mark Richard | Cloudmark, Inc. | Assignment of Assignor's Interest |
| Aug 7, 2019 Reel 50165, frame 273 | Cloudmark, Inc. | Cloudmark LLC | Change of Name |
| Aug 8, 2019 Reel 49997, frame 796 | 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
Aug 2035
Term ends Aug 28, 2035. Maintenance fees still fall due before then
Note
The 325 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
40
later US patents cite this one
That is top 10% 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.