Two patents currently held, every record listed here
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2 more records may belong here and await a decision; they are not counted.
The next term ends in Feb 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
2
Ending by 2030
Feb 2027
Next term end
2
Patent families
When these terms end
Each bar runs from grant to computed term end. 2008 to 2030.20132018202320282030
Every computed term in this portfolio is shown above.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Only 2 of the currently held patents qualify as notable.
Notable
Ends Feb 2027 · High confidence
Also notable
Ends May 2030 · High confidence
Fluid Flowrate Determination
US 7,412,881
Renewed at every maintenance window since the 2008 grant; no more fees are due before its term ends in 2027.
Variable Volume Hydrogen Storage
US 8,061,392
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2030.
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 1 largest of its 2 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Fluid Flowrate Determination | 1 in force | to Feb 2027 |
Patents held now
Soonest term end first.
Showing 1 to 2 of 2
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,412,881 | Fluid Flowrate Determination In force · High confidence | In force | High confidence | |
| US 8,061,392 | Variable Volume Hydrogen Storage In force · High confidence | In force | High confidence |
Also on record, not counted in the 2: 84 patents ended · 31 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.
7 terminal disclaimers are on file with no resolved reference. No cap is applied and none is guessed
2 computed term dates come from a chain with an unresolved parent. A continuity parent has not yet been fetched from USPTO's records. The term is dated from this application's own claim; no earlier date is assumed until the parent is resolved.