The Patent Finder

Persistent Systems Inc.,

11 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Dec 2031
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.
  • 1 fee due Dec 18, 2026
    The maintenance fee for Methods and Systems of a Dedupe Storage Network for Image Management (US 10,324,802) comes due Dec 18, 2026. Unpaid by Jun 21, 2027, it lapses early.
  • 1 fee due Jun 24, 2027
    The maintenance fee for Method and System of Migrating Applications to a Cloud-Computing Environment (US 10,514,988) comes due Jun 24, 2027. Unpaid by Dec 27, 2027, it lapses early.
  • 1 fee due Sep 8, 2027
    The maintenance fee for Method and system for email search (US 9,281,963) comes due Sep 8, 2027. Unpaid by Mar 8, 2028, it lapses early.
  • 1 fee due Oct 14, 2027
    The maintenance fee for Methods and Systems of a Dedupe File-System Garbage Collection (US 10,621,143) comes due Oct 14, 2027. Unpaid by Apr 14, 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 9,281,963Method and system for email search
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,558,076Methods and Systems of Cloud-Based Disaster Recovery
In force (reinstated)
 · High confidence
In force (reinstated)High confidence
US 10,049,016Distributed Garbage Collection for the Dedupe Storage Network
In force (reinstated)
 · High confidence
In force (reinstated)High confidence
US 11,086,662Method and System of Migrating Applications to a Cloud-Computing Environment
In force
 · High confidence
In forceHigh confidence
US 10,324,802Methods and Systems of a Dedupe Storage Network for Image Management
In force (reinstated)
 · High confidence
In force (reinstated)High confidence
US 10,824,516Method and System of Universal Server Migration
In force
 · High confidence
In forceHigh confidence
US 10,621,143Methods and Systems of a Dedupe File-System Garbage Collection
In force
 · High confidence
In forceHigh confidence
US 10,514,988Method and System of Migrating Applications to a Cloud-Computing Environment
In force
 · High confidence
In forceHigh confidence
US 11,163,447Dedupe File System for Bulk Data Migration to Cloud Platform
In force
 · High confidence
In forceHigh confidence
US 10,020,834Radio over internet protocol devices and methods for interoperability with land mobile radio devices
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 11 patents shown.
Pro members see all 11.
Pro members: see all 11 patents
Also on record, not counted in the 11: 4 lapsed for an unpaid fee. 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.

2 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