408 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
6 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
106
Ending by 2030
Nov 2026
Next term end
359
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jan 2028 · High confidence
Also notable
Ends Oct 2029 · High confidence
Also notable
Ends Jun 2033 · High confidence
Methods and Systems of Electronic Message Threading and Ranking
US 7,593,995
Cited by 190 later US patents, top 5% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Balanced Consistent Hashing for Distributed Resource Management
US 8,244,846
Cited by 123 later US patents, top 5% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
Providing Optimized Quality of Service to Prioritized Virtual Machines and Applications Based on Quality of Shared Resources
US 9,515,899
Cited by 164 later US patents, top 5% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
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 25, 2026The maintenance fee for Storage Device Sharing Among Virtual Machines (US 10,331,476) comes due Dec 25, 2026. Unpaid by Jun 25, 2027, it lapses early.
- 7 fees due Jan 2 to 28, 2027 · next Jan 2
- 10 fees due Feb 4 to 28, 2027 · next Feb 4
- 16 fees due Mar 1 to 29, 2027 · next Mar 1
- 9 fees due Apr 1 to 29, 2027 · next Apr 1
- 2 fees due May 5 to 10, 2027 · next May 5
- 3 fees due Jun 3 to 24, 2027 · next Jun 3
- 3 fees due Jul 5 to 21, 2027 · next Jul 5
- 3 fees due Aug 2 to 9, 2027 · next Aug 2
- 5 fees due Sep 1 to 22, 2027 · next Sep 1
- 5 fees due Oct 5 to 28, 2027 · next Oct 5
- 2 fees due Nov 10 to 12, 2027 · next Nov 10
Recent changes
- 3 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 359 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| I/O Scheduling and Load Balancing Across the Multiple Nodes of a Clustered Environment | 4 in force | to Feb 2034 |
| Tracking Access Pattern of Inodes and Pre-Fetching Inodes | 3 in force | to Nov 2037 |
| Methods and Systems for Maintaining Cache Coherency Between Caches of Nodes in a Clustered Environment | 3 in force | to Oct 2037 |
| Flexible Associativity in Multitenant Clustered Environments | 3 in force | to Jul 2037 |
| Systems and Methods for Performing Live Migrations of Software Containers | 3 in force | to Mar 2037 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,636,801 | Coordination of Quality of Service in a Multi-Layer Virtualized Storage Environment In force · High confidence | In force | High confidence | |
| US 7,506,202 | Compression of Temporal Dimension in a Temporal Storage Device In force · High confidence | In force | High confidence | |
| US 7,596,654 | Virtual Machine Spanning Multiple Computers In force · High confidence | In force | High confidence | |
| US 8,316,110 | System and Method for Clustering Standalone Server Applications and Extending Cluster Functionality In force · High confidence | In force | High confidence | |
| US 7,409,495 | Method and Apparatus for Providing a Temporal Storage Appliance with Block Virtualization in Storage Networks In force · High confidence | In force | High confidence | |
| US 7,580,956 | System and Method for Rating Reliability of Storage Devices In force · High confidence | In force | High confidence | |
| US 8,260,893 | Method and System for Automated Management of Information Technology In force · High confidence | In force | High confidence | |
| US 7,434,105 | Selective Self-Healing of Memory Errors Using Allocation Location Information In force · High confidence | In force | High confidence | |
| US 7,543,174 | Providing High Availability for an Application by Rapidly Provisioning a Node and Failing Over to the Node In force · High confidence | In force | High confidence | |
| US 7,668,981 | Storage Paths In force · High confidence | In force | High confidence |
Also on record, not counted in the 408: 153 patents ended. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.