179 patents currently held
13 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.
The next term ends in Mar 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
14
Ending by 2030
Mar 2027
Next term end
157
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jan 2041 · High confidence
Also notable
Ends Oct 2027 · High confidence
Also notable
Ends Dec 2039 · High confidence
Stable Mass Polymerizable Polycycloolefin Compositions as 3D Printing Materials and a Method of Fabrication Thereof
US 11,299,573
The newest of the three, granted 2022. It anchors the portfolio to 2041, later than anything else here.
Methods and Materials Useful for Chip Stacking, Chip and Wafer Bonding
US 7,932,161
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2027.
High Impact Strength 3D Printing Materials Derived from Polycycloolefin Monomers and Crosslinkers
US 11,142,662
Granted 2021. Computed term ends 2039.
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.
- 7 fees due Jan 4 to 30, 2027 · next Jan 4
- 2 fees due Feb 22 to 25, 2027 · next Feb 22
- 6 fees due Mar 5 to 19, 2027 · next Mar 5
- 3 fees due Apr 1 to 8, 2027 · next Apr 1
- 2 fees due May 12 to 26, 2027 · next May 12
- 2 fees due Jun 5, 2027
- 3 fees due Jul 21 to 23, 2027 · next Jul 21
- 1 fee due Aug 13, 2027The maintenance fee for UV ACTIVE DERIVATIVES OF Pd(AcAc)2 CATALYZED POLYCYCLOOLEFIN COMPOSITIONS AS OPTICAL MATERIALS (US 11,897,991) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
- 3 fees due Sep 17 to 26, 2027 · next Sep 17
- 2 fees due Oct 21 to 28, 2027 · next Oct 21
- 1 fee due Nov 14, 2027The maintenance fee for Method of Manufacturing Sandwich Panel and Sandwich Panel (US 11,981,114) comes due Nov 14, 2027. Unpaid by May 15, 2028, it lapses early.
Recent changes
- Oct 30Assignment recorded on 2 records: Sumitomo Bakelite Co., Ltd. to National Institute of Advanced Industrial Science and Technology Recorded Oct 30, 2026, executed Oct 22, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76582, frame 661.
- 4 of the patents on this record were granted since Aug 17, 2026
- 1 term has ended since Aug 17, 2026
What they patent
The 5 largest of its 157 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,263,416 | Methods and Materials Useful for Chip Stacking, Chip and Wafer Bonding In force · High confidence | In force | High confidence | |
| US 8,816,485 | Methods And Materials Useful For Chip Stacking, Chip And Wafer Bonding In force · High confidence | In force | High confidence | |
| US 7,932,161 | Methods and Materials Useful for Chip Stacking, Chip and Wafer Bonding In force · High confidence | In force | High confidence | |
| US 8,272,515 | Packaged Article Containing Electronic Device In force · High confidence | In force | High confidence | |
| US 8,309,280 | Positive-Type Photosensitive Resin Composition, Cured Film, Protective Film, Insulating Film, and Semiconductor Device In force · High confidence | In force | High confidence | |
| US 10,433,713 | Anti-Leak Valve Unit for Overtube In force · Medium confidence | In force | Medium confidence | |
| US D725,263 | Endoscope Hood In force · High confidence | In force | High confidence | |
| US 8,530,119 | Positive Photosensitive Resin Composition, Cured Film, Protective Film, Interlayer Insulating Film, and Semiconductor Device and Display Element Using the Same In force · High confidence | In force | High confidence | |
| US 9,005,876 | Positive Photosensitive Resin Composition for Spray Coating and Method for Producing Through Electrode Using the Same In force · Medium confidence | In force | Medium confidence | |
| US 8,986,923 | Aqueous Base-Developable Negative-Tone Films Based on Functionalized Norbornene Polymers In force · Medium confidence | In force | Medium confidence |
Also on record, not counted in the 179: 13 patents in force now held by others · 251 patents ended · 99 applications pending · 274 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.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.