12 patents currently held
10 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.
The next term ends in Dec 2026. from the record
Of the 10 now held by other companies, 10 name Leotek Corporation as their current owner. Each row says so.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
9
Ending by 2030
Dec 2026
Next term end
6
Patent families
When these terms end
Held patents by the year their term ends
notable patents
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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
Ends Apr 2027 · High confidence
Also notable
Ends Sep 2031 · High confidence
Also notable
Ends Dec 2026 · High confidence
Retrofitting of Fluorescent Tubes with Light-Emitting Diode (LED) Modules for Various Signs and Lighting Applications
US 7,488,086
The most cited patent in this portfolio, cited by 124 later US patents, top 5% of utility patents granted in 2009 in our data. Protection runs to 2027.
Integrated Signal Light Head
US 9,068,704
Cited by 18 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2031.
Signal Light Using Phosphor Coated LEDs
US 7,602,057
The largest patent family in this portfolio, 7 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2026.
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 Dec 30, 2026The maintenance fee for Integrated Signal Light Head (US 9,068,704) comes due Dec 30, 2026. Unpaid by Jun 30, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 3 largest of its 6 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Apparatus for Providing a Light Source That Combines Different Color LEDs | 6 in force | to Nov 2027 |
| Integrated Signal Light Head | 2 in force | to Sep 2031 |
| Retrofitting of Fluorescent Tubes with Light-Emitting Diode (LED) Modules for Various Signs and Lighting Applications | 1 in force | to Apr 2027 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,602,057 | Signal Light Using Phosphor Coated LEDs In force · High confidence | In force | High confidence | |
| US 7,973,402 | "An LED Light Using Phosphor Coated Leds" In force · High confidence | In force | High confidence | |
| US 8,328,388 | Signal Light Using Phosphor Coated LEDs In force · Low confidence | In force | Low confidence | |
| US 8,432,029 | Signal Light Using Phosphor Coated LEDs In force · High confidence | In force | High confidence | |
| US 7,488,086 | Retrofitting of Fluorescent Tubes with Light-Emitting Diode (LED) Modules for Various Signs and Lighting Applications In force · High confidence | In force | High confidence | |
| US 7,777,322 | Apparatus for Providing a Light Source That Combines Different Color LEDs In force · High confidence | In force | High confidence | |
| US 7,810,963 | Light Emitting Diode Module with Improved Light Distribution Uniformity In force · High confidence | In force | High confidence | |
| US 7,918,582 | Signal Light Using Phosphor Coated LEDs In force · High confidence | In force | High confidence | |
| US 8,410,402 | Method and Apparatus for Using Light Emitting Diodes for Removing Moisture In force · High confidence | In force | High confidence | |
| US 9,068,704 | Integrated Signal Light Head In force · High confidence | In force | High confidence |
Also on record, not counted in the 12: 10 patents in force now held by others · 12 patents ended · 5 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.