1,837 patents currently held
156 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.
9 more records may belong here and await a decision; they are not counted.
The next term ends in Jan 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
157
Ending by 2030
Jan 2027
Next term end
1,271
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 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. 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 Jun 2030 · High confidence
Also notable
Ends Aug 2028 · Medium confidence
Also notable
Ends Jun 2032 · High confidence
Ion Generation Using Wetted Porous Material
US 8,859,956
Cited by 218 later US patents, top 5% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Psma Binding Ligand-Linker Conjugates and Methods for Using
US 10,624,969
Cited by 38 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2028.
Ion Generation Using Modified Wetted Porous Materials
US 8,895,918
Cited by 72 later US patents, top 10% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.
Formerly held, still cited
Notable
Ends Jun 2030 · High confidence
Cited by 103 later US patents, top 10% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
now held by DePuy Synthes Products, Inc.
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.
- 12 fees due Nov 19 to 30, 2026 · next Nov 19
- 47 fees due Dec 4 to 30, 2026 · next Dec 4
- 35 fees due Jan 2 to 30, 2027 · next Jan 2
- 33 fees due Feb 1 to 28, 2027 · next Feb 1
- 34 fees due Mar 3 to 26, 2027 · next Mar 3
- 42 fees due Apr 1 to 30, 2027 · next Apr 1
- 56 fees due May 3 to 28, 2027 · next May 3
- 41 fees due Jun 1 to 30, 2027 · next Jun 1
- 35 fees due Jul 2 to 30, 2027 · next Jul 2
- 18 fees due Aug 2 to 27, 2027 · next Aug 2
- 39 fees due Sep 1 to 30, 2027 · next Sep 1
- 36 fees due Oct 2 to 30, 2027 · next Oct 2
- 12 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Nov 10Assignment recorded on 1 record: Porterfield, D. Marshall and 10 others to Purdue Research Foundation Recorded Nov 10, 2026, executed Nov 10, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76706, frame 295.
- Nov 9Assignment recorded on 1 record: Dong, Jiajun and 3 others to Purdue Research Foundation Recorded Nov 9, 2026, executed Jul 3, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76685, frame 592.
- 52 of the patents on this record were granted since Aug 16, 2026
- 20 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 1,271 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Ion Generation Using Wetted Porous Material | 24 in force | to Dec 2030 |
| Psma Binding Ligand-Linker Conjugates and Methods for Using | 18 in force | to Jan 2031 |
| Processes for the Production of Xylitol | 10 in force | to Oct 2033 |
| Synthesis and Composition of Amino Acid Linking Groups Conjugated to Compounds Used for the Targeted Imaging of Tumors | 9 in force | to Feb 2036 |
| Ion Focusing | 9 in force | to May 2033 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,583,780 | Systems and Methods for Improving a Resolution of an Image In force · High confidence | In force | High confidence | |
| US 7,626,236 | Transistor Including Paramagnetic Impurities and Having Anti-Parallel Ferromagnetic Contacts In force · High confidence | In force | High confidence | |
| US 7,633,130 | High-Performance Field Effect Transistors with Self-Assembled Nanodielectrics In force · High confidence | In force | High confidence | |
| US 7,566,383 | Heat Recovery from a Biomass Heat Source In force · High confidence | In force | High confidence | |
| US 7,555,936 | Hydraulic Hose with Integral Life-Sensing Capability and Method Therefor In force · High confidence | In force | High confidence | |
| US 7,617,750 | Process of Producing Nanocrystalline Bodies In force · High confidence | In force | High confidence | |
| US 8,759,465 | Cross-Linkable Polymeric Compositions In force · Medium confidence | In force | Medium confidence | |
| US 7,522,282 | Molecular Interferometric Imaging Process and Apparatus In force · High confidence | In force | High confidence | |
| US 8,741,352 | Graft Materials Containing Ecm Components, and Methods for Their Manufacture In force · Medium confidence | In force | Medium confidence | |
| US 8,084,055 | Collagen Preparation and Method of Isolation In force · High confidence | In force | High confidence |
Also on record, not counted in the 1,837: 156 patents in force now held by others · 424 patents ended · 763 applications pending · 651 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.