Ambrell Corporation
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
3
Ending by 2030
Dec 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.
- 1 fee due Apr 20, 2027The maintenance fee for Power system component protection system for use with an induction heating system (US 9,167,631) comes due Apr 20, 2027. Unpaid by Oct 20, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
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.
Showing 1 to 5 of 5
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,551,011 | Constant phase angle control for frequency agile power switching systems In force · From the USPTO record | In force | From the USPTO record | |
| US 8,331,115 | Power switching system to increase induction heating to a load from available AC mains power In force · From the USPTO record | In force | From the USPTO record | |
| US 10,206,250 | Food Heater In force · Low confidence | In force | Low confidence | |
| US 9,167,631 | Power system component protection system for use with an induction heating system In force · From the USPTO record | In force | From the USPTO record | |
| US 9,439,246 | Dynamic power balancing among multiple induction heater power units In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 5: 18 lapsed for an unpaid fee · 14 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.