Leadtrend Technology Corp.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 3 name spellings.
14
Ending by 2030
Sep 2027
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
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.
- 6 fees due Jan 7 to 23, 2027 · next Jan 7
- 4 fees due Feb 4 to 27, 2027 · next Feb 4
- 3 fees due Apr 13 to 24, 2027 · next Apr 13
- 3 fees due May 12 to 24, 2027 · next May 12
- 2 fees due Jun 15 to 26, 2027 · next Jun 15
- 2 fees due Jul 12, 2027
- 3 fees due Aug 4 to 25, 2027 · next Aug 4
- 3 fees due Sep 3 to 29, 2027 · next Sep 3
- 1 fee due Oct 19, 2027The maintenance fee for Control circuit for reducing touch current of a power converter and operation method thereof (US 9,318,950) comes due Oct 19, 2027. Unpaid by Apr 19, 2028, it lapses early.
- 3 fees due Nov 3 to 10, 2027 · next Nov 3
Recent changes
- 2 of the patents on this record were granted since Aug 16, 2026
- 1 term has ended since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,576,620 | Pseudo random clock generator In force · From the USPTO record | In force | From the USPTO record | |
| US 7,573,730 | Charging device with boundary mode control In force · From the USPTO record | In force | From the USPTO record | |
| US 7,773,394 | Digital latch control circuit for over-voltage protection and power converter using the control circuit In force · From the USPTO record | In force | From the USPTO record | |
| US 7,835,163 | Switching power converter with a secondary-side control In force · From the USPTO record | In force | From the USPTO record | |
| US 7,830,677 | Switching power converter controlled by a winding voltage sampler In force · From the USPTO record | In force | From the USPTO record | |
| US 7,902,833 | Malfunction detecting circuit and malfunction detecting method for detecting malfunction of current-sensing resistor, and power converting system applying the malfunction detecting circuit In force · From the USPTO record | In force | From the USPTO record | |
| US 7,898,823 | Quasi-resonant fly-back converter without auxiliary winding In force · From the USPTO record | In force | From the USPTO record | |
| US 7,978,487 | Switching power supply and over-temperature protection method In force · From the USPTO record | In force | From the USPTO record | |
| US 8,717,110 | Frequency-jittering apparatuses, frequency-jittering methods and power management devices In force · From the USPTO record | In force | From the USPTO record | |
| US 8,049,571 | Frequency-jittering apparatuses, frequency-jittering methods and power management devices In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 153: 42 lapsed for an unpaid fee · 2 ended at full term. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
1 pending · 28 no status recorded