0 patents currently held
11 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.
2 more records may belong here and await a decision; they are not counted.
This portfolio holds none of the 11 US patents in force on its record. from the record
Of the 11 now held by other companies, 11 name Celanese International Corporation as their current owner. Each row says so.
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
Held patents by the year their term ends
2026 · 0 end2027 · 02028 · 02029 · 02030 · 0
notable patents
all others
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: the highest-ranked patents in this portfolio by citations and family size.
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 no later than Dec 2026 · Medium confidence
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2026. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
now held by Celanese International Corporation
Also notable
Ends no later than Mar 2027 · Medium confidence
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2027. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
now held by Celanese International Corporation
Also notable
Ends May 2027 · High confidence
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2027.
now held by Celanese International Corporation
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
- 1 term has ended since Aug 16, 2026
Patents held now
Soonest term end first.
Also on record: 11 patents in force now held by others · 48 patents ended · 11 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.
6 terminal disclaimers are on file with no resolved reference. No cap is applied and none is guessed