The Patent Finder
MA

Mailfrontier, Inc.

First filing 2002
OverviewNotableFeesChangesPatent listSources & methods

0 patents currently held, every record listed here

2 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2 more records may belong here and await a decision; they are not counted.

This portfolio holds none of the 2 US patents in force on its record. from the record

Of the 2 now held by other companies, 1 name Quest Software Inc. as their current owner, and 1 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
none
Next term end

When these terms end

Each bar runs from grant to computed term end. 2012 to 2029.
US 8,122,508 Analyzing Traffic Patterns to Detect Infectious Messages Mar 5, 2027
US 8,886,727 Message distribution control Feb 21, 2029
20162020202420282029
Every computed term in this portfolio is shown above.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 patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
None of the currently held patents qualifies as notable.

Formerly held, still cited

Notable
The most cited patent in this portfolio, cited by 34 later US patents, top 25% of utility patents granted in 2012 in our data. Protection runs to 2027.
conveyed to Sonicwall Inc. - now held by Quest Software Inc.
Ends Mar 2027 · High confidence
Also notable
Granted 2014 and renewed at 2 of 3 maintenance windows. Protection runs to 2029.
Ends Feb 2029 · Low confidence

Fee deadlines

No maintenance fee falls due on this company's record before Nov 10, 2027.

Recent changes

  • 1 term has ended since Aug 16, 2026

Patents held now

Soonest term end first.
Also on record: 2 patents in force now held by others · 68 patents ended · 10 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.
4 terminal disclaimers are on file with no resolved reference. No cap is applied and none is guessed
10 computed term dates come from a chain with an unresolved parent. A continuity parent has not yet been fetched from USPTO's records. The term is dated from this application's own claim; no earlier date is assumed until the parent is resolved.
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