23 patents currently held

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

The next term ends in May 2029. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

May 2029

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

2026202720282029 20302031203220332034 2035 2036 2037 20382039204020412042204320442045

notable patents all others 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

Notable: the highest-ranked patents in this portfolio by citations and family size.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Method and Apparatus for Content-Aware and Adaptive Deduplication US 8,412,848

The most cited patent in this portfolio, cited by 188 later US patents, top 5% of utility patents granted in 2013 in our data. Protection runs to 2030.

Ends Sep 2030 · High confidence Also notable

Next-Level Multi-Level Deduplication US 10,067,946

Cited by 12 later US patents, top 25% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2035. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.

Ends no later than Feb 2035 · Medium confidence Also notable

Systems and Methods for Managing Delta Version Chains US 8,589,363

Cited by 27 later US patents, top 25% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.

Ends Mar 2032 · High confidence

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 Feb 20, 2027
The maintenance fee for Scalable Grid Deduplication (US 10,387,374) comes due Feb 20, 2027. Unpaid by Aug 20, 2027, it lapses early.
1 fee due Apr 22, 2027
The maintenance fee for Multi-Level Deduplication (US 10,452,617) comes due Apr 22, 2027. Unpaid by Oct 22, 2027, it lapses early.
3 fees due Jun 3 to 29, 2027 · next Jun 3
1 fee due Aug 6, 2027
The maintenance fee for Protection and recovery of backup storage systems from ransomware attacks (US 11,893,109) comes due Aug 6, 2027. Unpaid by Feb 7, 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.

What they patent

The 5 largest of its 15 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Multi-Level Deduplication	3 in force	to Jan 2036
Method and Apparatus for Content-Aware and Adaptive Deduplication	3 in force	to Sep 2030
Parallelizing and Deduplicating Backup Data	2 in force	to Mar 2037
Scalable Grid Deduplication	2 in force	to Feb 2037
Systems and Methods for Version Chain Clustering	2 in force	to May 2034

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,812,738	Method And Apparatus For Content-Aware And Adaptive Deduplication In force Term ends May 29, 2029 · High confidence	In force	Term ends May 29, 2029	High confidence
US 9,223,794	Method And Apparatus For Content-Aware And Adaptive Deduplication In force Ends no later than May 29, 2029 · Medium confidence	In force	Ends no later than May 29, 2029	Medium confidence
US 8,412,848	Method and Apparatus for Content-Aware and Adaptive Deduplication In force Term ends Sep 10, 2030 · High confidence	In force	Term ends Sep 10, 2030	High confidence
US 11,336,295	Systems and Methods for Version Chain Clustering In force Term ends Jan 12, 2032 · High confidence	In force	Term ends Jan 12, 2032	High confidence
US 8,589,363	Systems and Methods for Managing Delta Version Chains In force Term ends Mar 29, 2032 · High confidence	In force	Term ends Mar 29, 2032	High confidence
US 9,430,546	Systems and Methods for Managing Delta Version Chains In force Ends no later than Mar 29, 2032 · Medium confidence	In force	Ends no later than Mar 29, 2032	Medium confidence
US 10,498,356	Systems and Methods for Version Chain Clustering In force Term ends May 27, 2034 · High confidence	In force	Term ends May 27, 2034	High confidence
US 9,223,812	Adaptive Scheduled Periodic Caching In force Term ends Jun 28, 2034 · High confidence	In force	Term ends Jun 28, 2034	High confidence
US 10,067,946	Next-Level Multi-Level Deduplication In force Ends no later than Feb 18, 2035 · Medium confidence	In force	Ends no later than Feb 18, 2035	Medium confidence
US 10,452,617	Multi-Level Deduplication In force Ends no later than Feb 18, 2035 · Medium confidence	In force	Ends no later than Feb 18, 2035	Medium confidence

10 of 23 patents shown.

Pro members see all 23.

Pro members: see all 23 patents

Also on record, not counted in the 23: 4 patents ended · 1 application abandoned. 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.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Export every term end as CSV · Pro

Exagrid Systems, Inc.