Lapsed Jul 17, 2026 on the fee record · Medium confidence
20-year base term ends Jan 19, 2035
Why Medium: The fee record shows no payment for this window, and USPTO's status still reads "Patented Case".
Second maintenance fee unpaid; grace period ended. The USPTO has not yet posted the lapse.
Held by Imperva, Inc.
Filed Sep 16, 2016 as application 15/268,510 · Granted Jul 17, 2018
Base term, 20 years from filing
Today
Lapsed Jul 17, 2026
2015
2035
Clock starts
Jan 19, 2015
Jan 19, 2015
No longer in force
Jul 17, 2026
Jul 17, 2026
Granted
Jul 17, 2018
Jul 17, 2018
Term would have run to
Jan 19, 2035
Jan 19, 2035
base term
after the term ends
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.
None
Terminal disclaimer
No disclaimer on this record.
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.
10
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 Jan 19, 2035: its 20-year base term, with no adjustment for prosecution delay. Confidence: Medium. 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 Jan 19, 2015, when application 14/599,978, the earliest non-provisional in its chain, was filed (this one was filed Sep 16, 2016) | Jan 19, 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | The fee record shows no payment for this window, and USPTO's status still reads "Patented Case" | lapsed Jul 17, 2026 | Medium confidence |
| Computed term end | The steps above, in order | Jul 17, 2026 | Medium confidence |
This family
| Application 61/929,474 | Provisional application no patent term | no patent term |
| US 9,519,774 | In force Jan 2035 | Jan 2035 |
| Application PCT/US2015/012082 | PCT application no patent term | no patent term |
| Application 62/220,903 | Provisional application no patent term | no patent term |
| US 10,002,254 | In force Jan 2035 | Jan 2035 |
| US 10,025,936 | this patent Jul 2026 | Jul 2026 |
| Application PCT/US2016/052387 | PCT application no patent term | no patent term |
| US 11,100,218 | In force Jan 2035 | Jan 2035 |
8 of 10 applications in this family shown, earliest filings first. 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 13, 2017 Reel 41002, frame 447 | Anand, Kunal; Crampon, Michael; Meester, Richard; Rozner, Joseph; Chase, Joshua | Prevoty, Inc. | Assignment of Assignor's Interest |
| Jun 26, 2018 Reel 46199, frame 866 | Anand, Kunal | Prevoty, Inc. | Assignment of Assignor's Interest |
| Jan 15, 2019 Reel 48077, frame 753 | Prevoty, Inc. | Bank of America, N.A., as Collateral Agent | First Lien Intellectual Property Security Agreement |
| Jan 15, 2019 Reel 48077, frame 795 | Prevoty, Inc. | Goldman Sachs Bank USA, as Collateral Agent | Second Lien Intellectual Property Security Agreement |
| Feb 23, 2022 Reel 59353, frame 953 | Prevoty, Inc. | Prevoty, Inc. | Change of Assignee Address |
| May 2, 2022 Reel 59786, frame 372 | Prevoty, Inc. | Imperva, Inc. | Assignment of Assignor's Interest |
| Dec 1, 2023 Reel 65744, frame 45 | Bank of America, N.A., as Agent | Prevoty, Inc. | Release of First Lien Security Interest in Intellectual Property Recorded at R/F 048077/0753 |
| Dec 1, 2023 Reel 65744, frame 67 | Goldman Sach Bank USA, as Agent | Prevoty, Inc. | Release of Second Lien Security Interest in Intellectual Property Recorded at R/F 048077/0795 |
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.
Citations
4
later US patents cite this one
That is above the median of utility patents granted in 2018 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.