0 patents currently held, every record listed here
4 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.
This portfolio holds none of the 4 US patents in force on its record. from the record
Of the 4 now held by other companies, 3 name Sumitomo Chemical Company Limited as their current owner, and 1 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
none
Next term end
When these terms end
Each bar runs from grant to computed term end. 2013 to 2031.
US 9,048,442
Composition Containing a Metal Complex and Organic Compound, and Light-Emitting Element Using Said Compound
Sep 1, 2031
20172021202520292031
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
None of the currently held patents qualifies as notable.
Formerly held, still cited
Notable
Ends Jun 2029 · High confidence
Renewed at every maintenance window since the 2013 grant; no more fees are due before its term ends in 2029.
now held by Sumitomo Chemical Company, Limited
Also notable
Ends Sep 2031 · High confidence
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2031.
now held by Sumitomo Chemical Company, Limited
Also notable
Ends Mar 2031 · High confidence
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2031.
now held by Sumitomo Chemical Company, Limited
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
- 2 terms have ended since Aug 16, 2026
Patents held now
Soonest term end first.
Also on record: 4 patents in force now held by others · 15 patents ended · 28 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.
2 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.