97 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
4 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
25
Ending by 2030
Dec 2026
Next term end
76
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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Nov 2039 · High confidence
Also notable
Ends Apr 2040 · High confidence
Also notable
Ends Feb 2035 · High confidence
Service Link Grooming in Data Communication Networks
US 11,621,887
Cited by 3 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2039.
Satisfying Service Demands in Data Communication Networks
US 10,841,003
Cited by 9 later US patents, top 25% of utility patents granted in 2020 in our data. Protection runs to 2040.
Osnr Margin Monitoring for Optical Coherent Signals
US 9,859,976
Granted 2018 and renewed at every maintenance window due so far. Protection runs to 2035.
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 Nov 19, 2026The maintenance fee for Method of Provisioning H-Vpls Services in a Multi-Domain MPLS Network (US 9,036,644) comes due Nov 19, 2026. Unpaid by May 19, 2027, it lapses early.
- 1 fee due Dec 6, 2026The maintenance fee for Preplan Assignment Generation (US 11,671,323) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
- 3 fees due Feb 18 to 22, 2027 · next Feb 18
- 1 fee due Mar 17, 2027The maintenance fee for Osnr Margin Monitoring for Optical Coherent Signals (US 10,419,110) comes due Mar 17, 2027. Unpaid by Sep 17, 2027, it lapses early.
- 2 fees due May 24 to 26, 2027 · next May 24
- 2 fees due Jun 3 to 8, 2027 · next Jun 3
- 1 fee due Jul 30, 2027The maintenance fee for Communication Network Configuration (US 11,888,723) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.
- 2 fees due Aug 6 to 13, 2027 · next Aug 6
- 2 fees due Sep 12 to 15, 2027 · next Sep 12
- 1 fee due Oct 26, 2027The maintenance fee for Method for Managing Data Transport Using Crosstalk Data (US 9,325,371) comes due Oct 26, 2027. Unpaid by Apr 26, 2028, it lapses early.
Recent changes
- 3 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 76 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Service Link Grooming in Data Communication Networks | 4 in force | to Nov 2039 |
| Spectral Defragmentation in Communication Networks | 3 in force | to Aug 2043 |
| Systems and Methods for Configuring a Communications Network | 3 in force | to Jul 2040 |
| Satisfying Service Demands in Data Communication Networks | 3 in force | to Apr 2040 |
| Osnr Margin Monitoring for Optical Coherent Signals | 3 in force | to Mar 2035 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,864,389 | Method of Controlling Optical Amplifier Located Along an Optical Link In force · High confidence | In force | High confidence | |
| US 8,189,574 | Method and Device for Providing Communication Services In force · High confidence | In force | High confidence | |
| US 7,551,571 | Technology for Improving STP Protocols in Ethernet Networks Supporting Vlans In force · High confidence | In force | High confidence | |
| US 7,751,707 | Method and System for Controlling Optical Network In force · High confidence | In force | High confidence | |
| US 7,924,835 | Method and Device for Providing Multicast Services to Multiple Customers In force · High confidence | In force | High confidence | |
| US 7,840,133 | Method and System for Hybrid Protection in Optical Networks In force · High confidence | In force | High confidence | |
| US 8,327,021 | Technique of Determining Connectivity Solutions for Network Elements In force · High confidence | In force | High confidence | |
| US 7,630,386 | Method for Providing Broadband Communication Service In force · High confidence | In force | High confidence | |
| US 8,116,197 | Method for Finding Protected Path in Mesh Networks In force · High confidence | In force | High confidence | |
| US 8,045,258 | Method for Regulating Osnr in a Fiber Optic Communication Line Using Raman Amplification In force · High confidence | In force | High confidence |
Also on record, not counted in the 97: 52 patents ended · 7 applications pending · 34 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.