The Patent Finder

Imperva, Inc.

132 patents currently held · Updated Nov 14, 2026
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
13
Ending by 2030
Jun 2027
Next term end

When these terms end

Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
  • 2 fees due Dec 20 to 27, 2026 · next Dec 20
  • 6 fees due Feb 1 to 15, 2027 · next Feb 1
  • 9 fees due Mar 3 to 29, 2027 · next Mar 3
  • 1 fee due Apr 17, 2027
    The maintenance fee for Robust learning of web traffic (US 11,792,209) comes due Apr 17, 2027. Unpaid by Oct 18, 2027, it lapses early.
  • 1 fee due May 5, 2027
    The maintenance fee for Techniques for detecting compromises of enterprise end stations utilizing noisy tokens (US 10,469,523) comes due May 5, 2027. Unpaid by Nov 5, 2027, it lapses early.
  • 4 fees due Aug 13 to 27, 2027 · next Aug 13
  • 1 fee due Oct 12, 2027
    The maintenance fee for Systems and Methods for Tokenizing User-Generated Content to Enable the Prevention of Attacks (US 9,313,223) comes due Oct 12, 2027. Unpaid by Apr 12, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
PatentTitleStatus Expires Confidence
US 7,974,942Data masking system and method
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,752,662Method and apparatus for high-speed detection and blocking of zero day worm attacks
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,453,255Method for monitoring stored procedures
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,984,630System and method for preventing web frauds committed using client-scripting attacks
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,743,420Dynamic learning method and adaptive normal behavior profile (NBP) architecture for providing fast protection of enterprise applications
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,640,235System and method for correlating between HTTP requests and SQL queries
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,024,804Correlation engine for detecting network attacks and detection method
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,051,484Method and security system for indentifying and blocking web attacks by enforcing read-only parameters
In force (reinstated)
 · From the USPTO record
In force (reinstated)From the USPTO record
US 9,455,997System and method for preventing web frauds committed using client-scripting attacks
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,392,963Techniques for tracking actual users in web application security systems
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 132 patents shown.
Pro members see all 132.
Pro members: see all 132 patents
Also on record, not counted in the 132: 1 patent in force now held by others · 2 lapsed for an unpaid fee · 3 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

1 pending · 5 no status recorded

List them

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited