The Patent Finder
L3

Level 3 Communications, LLC

Filings on record here from 2001, where this site's data begins
OverviewNotableFeesChangesFamiliesPatent listSources & methods

760 patents currently held

245 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.
13 more records may belong here and await a decision; they are not counted.

The next term ends in Feb 2027. from the record

Of the 245 now held by other companies, 237 name Sandpiper CDN LLC as their current owner, and 8 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
73
Ending by 2030
Feb 2027
Next term end
321
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 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. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

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.
  • 11 fees due Dec 6 to 25, 2026 · next Dec 6
  • 21 fees due Jan 2 to 30, 2027 · next Jan 2
  • 15 fees due Feb 4 to 28, 2027 · next Feb 4
  • 14 fees due Mar 1 to 22, 2027 · next Mar 1
  • 13 fees due Apr 1 to 29, 2027 · next Apr 1
  • 17 fees due May 3 to 28, 2027 · next May 3
  • 16 fees due Jun 1 to 30, 2027 · next Jun 1
  • 11 fees due Jul 2 to 21, 2027 · next Jul 2
  • 14 fees due Aug 6 to 27, 2027 · next Aug 6
  • 16 fees due Sep 3 to 30, 2027 · next Sep 3
  • 11 fees due Oct 9 to 28, 2027 · next Oct 9
  • 3 fees due Nov 5 to 12, 2027 · next Nov 5

Which patents, and when each one lapses · Pro

Recent changes

  • 10 of the patents on this record were granted since Aug 16, 2026
  • 8 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 321 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Patents held now

Soonest term end first.
PatentTitleStatusExpiresConfidence
US 8,085,689Network Configuration Optimization
In force
 · High confidence
In forceHigh confidence
US 8,823,878Broadcast Method and System
In force
 · High confidence
In forceHigh confidence
US 7,813,335Internet Protocol Trunk Groups
In force
 · High confidence
In forceHigh confidence
US 8,520,667Internet Protocol Trunk Groups
In force
 · High confidence
In forceHigh confidence
US 8,560,362Systems and Methods for Managing Business Processes in an Enterprise
In force
 · High confidence
In forceHigh confidence
US 7,864,710System and Method for Routing Signaling Messages in a Communication Network
In force
 · High confidence
In forceHigh confidence
US 7,734,019Systems and Methods for Third Party Emergency Call Termination
In force
 · High confidence
In forceHigh confidence
US 7,752,297Systems and Methods for Flow Signature Formation and Use
In force
 · High confidence
In forceHigh confidence
US 7,519,074Voice Call Coordinator
In force
 · High confidence
In forceHigh confidence
US 8,842,817Functionalities for Local Number Portability in a Telecommunications Network
In force
 · High confidence
In forceHigh confidence
10 of 760 patents shown.
Pro members see all 760.
Pro members: see all 760 patents
Also on record, not counted in the 760: 245 patents in force now held by others · 244 patents ended · 96 applications pending · 171 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.
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.
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