23 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 Jul 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2027

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 2028 2029 203020312032 2033203420352036203720382039204020412042204320442045

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

System and method for providing security for SIP-based communications US 8,464,329

The most cited patent in this portfolio, cited by 240 later US patents, top 5% of utility patents granted in 2013 in our data. Protection runs to 2028.

Ends May 2028 · High confidence Also notable

Method and Apparatus for Detecting and Handling Evil Twin Access Points US 11,432,152

Cited by 10 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2040.

Ends Aug 2040 · High confidence Also notable

Method and System for Recognizing Desired Email US 7,627,641

Cited by 58 later US patents, top 25% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.

Ends Oct 2028 · 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 Apr 1, 2027
The maintenance fee for Systems and Methods for Identifying and Performing an Action in Response to Identified Malicious Network Traffic (US 10,432,658) comes due Apr 1, 2027. Unpaid by Oct 1, 2027, it lapses early.
1 fee due Jun 1, 2027
The maintenance fee for Cluster Architecture for Network Security Processing (US 9,203,865) comes due Jun 1, 2027. Unpaid by Dec 1, 2027, it lapses early.
2 fees due Jul 2, 2027

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended since Aug 16, 2026

What they patent

The 3 largest of its 4 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Method and Apparatus for Controlling Unsolicited Messaging	17 in force	to Apr 2033
Method and Apparatus for Detecting and Handling Evil Twin Access Points	3 in force	to Aug 2040
Method and System for Recognizing Desired Email	2 in force	to Oct 2028

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,572,190	Method and System for Recognizing Desired Email In force Term ends Jul 1, 2027 · High confidence	In force	Term ends Jul 1, 2027	High confidence
US 7,882,187	Method and System for Detecting Undesired Email Containing Image-Based Messages In force Term ends Dec 3, 2027 · High confidence	In force	Term ends Dec 3, 2027	High confidence
US 7,613,923	Method and Apparatus for Controlling Unsolicited Messaging in Real Time Messaging Networks In force Term ends Mar 11, 2028 · High confidence	In force	Term ends Mar 11, 2028	High confidence
US 8,464,329	System and method for providing security for SIP-based communications In force Term ends May 16, 2028 · High confidence	In force	Term ends May 16, 2028	High confidence
US 7,584,256	Replicating Message Queues Between Clustered Email Gateway Systems In force Term ends Jul 2, 2028 · High confidence	In force	Term ends Jul 2, 2028	High confidence
US 7,617,305	Email Server System and Method In force Term ends Aug 4, 2028 · High confidence	In force	Term ends Aug 4, 2028	High confidence
US 7,613,172	Method and Apparatus for Controlling Unsolicited Messaging In force Term ends Aug 31, 2028 · High confidence	In force	Term ends Aug 31, 2028	High confidence
US 7,627,641	Method and System for Recognizing Desired Email In force Term ends Oct 1, 2028 · High confidence	In force	Term ends Oct 1, 2028	High confidence
US 8,191,132	Scalable Transparent Proxy In force Term ends Dec 15, 2028 · Medium confidence	In force	Term ends Dec 15, 2028	Medium confidence
US 8,527,592	Reputation-Based Method and System for Determining a Likelihood That a Message Is Undesired In force Term ends Jan 15, 2029 · High confidence	In force	Term ends Jan 15, 2029	High 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: 17 patents ended · 2 applications pending · 4 applications 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.

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Watchguard Technologies, Inc.