Field Upgrading Limited
55 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.
Recorded under 2 name spellings.
10
Ending by 2030
Nov 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 Jan 30, 2027The maintenance fee for Na Based Secondary Battery (US 10,367,226) comes due Jan 30, 2027. Unpaid by Jul 30, 2027, it lapses early.
- 1 fee due Jun 8, 2027The maintenance fee for Nickel-metal hydride/hydrogen hybrid battery using alkali ion conducting separator (US 9,209,445) comes due Jun 8, 2027. Unpaid by Dec 8, 2027, it lapses early.
- 1 fee due Aug 16, 2027The maintenance fee for Method for providing electrical potential from a sodium-based secondary cell (US 9,263,770) comes due Aug 16, 2027. Unpaid by Feb 16, 2028, 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.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,159,192 | Method for charging a nickel-metal hydride battery In force · From the USPTO record | In force | From the USPTO record | |
| US 8,722,221 | Method of discharging a nickel-metal hydride battery In force · From the USPTO record | In force | From the USPTO record | |
| US 9,631,285 | Electrochemical process for the production of synthesis gas using atmospheric air and water In force · From the USPTO record | In force | From the USPTO record | |
| US 8,012,633 | Advanced metal-air battery having a ceramic membrane electrolyte In force · From the USPTO record | In force | From the USPTO record | |
| US 8,012,621 | Nickel-metal hydride battery using alkali ion conducting separator In force · From the USPTO record | In force | From the USPTO record | |
| US 9,209,445 | Nickel-metal hydride/hydrogen hybrid battery using alkali ion conducting separator In force · From the USPTO record | In force | From the USPTO record | |
| US 8,216,722 | Solid electrolyte for alkali-metal-ion batteries In force · From the USPTO record | In force | From the USPTO record | |
| US 8,075,746 | Electrochemical cell for production of synthesis gas using atmospheric air and water In force · From the USPTO record | In force | From the USPTO record | |
| US 8,323,817 | Alkali metal seawater battery In force · From the USPTO record | In force | From the USPTO record | |
| US 9,263,770 | Method for providing electrical potential from a sodium-based secondary cell In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 28: 55 patents in force now held by others · 4 lapsed for an unpaid fee · 1 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 · 1 abandoned · 2 no status recorded