268 patents currently held

37 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.

The next term ends in Mar 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Mar 2027

Next term end

198

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 204320442045

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

Novel D3 Dopamine Receptor Agonists to Treat Dyskinesia in Parkinson's Disease US 9,289,400

Cited by 51 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2031.

Ends Aug 2031 · High confidence Also notable

Physical Forms of Mxene Materials Exhibiting Novel Electrical and Optical Characteristics US 10,573,768

Cited by 25 later US patents, top 10% of utility patents granted in 2020 in our data. Protection runs to 2036.

Ends Aug 2036 · High confidence Also notable

Compositions Comprising Free-Standing Two-Dimensional Nanocrystals US 9,193,595

Cited by 48 later US patents, top 10% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2032.

Ends Jun 2032 · Medium confidence

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.

1 fee due Nov 19, 2026
The maintenance fee for Bi-Directional Magnetic Permeability Enhanced Metamaterial (MPEM) Substrate for Antenna Miniaturization (US 9,035,831) comes due Nov 19, 2026. Unpaid by May 19, 2027, it lapses early.
5 fees due Dec 4 to 27, 2026 · next Dec 4
4 fees due Jan 2 to 18, 2027 · next Jan 2
5 fees due Feb 8 to 18, 2027 · next Feb 8
5 fees due Mar 5 to 19, 2027 · next Mar 5
8 fees due Apr 1 to 27, 2027 · next Apr 1
5 fees due May 5 to 28, 2027 · next May 5
11 fees due Jun 5 to 30, 2027 · next Jun 5
9 fees due Jul 2 to 28, 2027 · next Jul 2
2 fees due Aug 20 to 25, 2027 · next Aug 20
4 fees due Sep 5 to 29, 2027 · next Sep 5
6 fees due Oct 5 to 30, 2027 · next Oct 5
1 fee due Nov 14, 2027
The maintenance fee for Identification and Personalized Protection of Text Data Using Shapley Values (US 11,983,497) comes due Nov 14, 2027. Unpaid by May 15, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nov 10Assignment recorded on US 11,724,998: Kortagere, Sandhya to Drexel University Recorded Nov 10, 2026, executed Feb 1, 2018. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76704, frame 431.
Oct 27Assignment recorded on 1 record: Ghidiu, Michael J. and 4 others to Drexel University Recorded Oct 27, 2026, executed Sep 16, 2015. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76526, frame 544.
5 of the patents on this record were granted since Aug 17, 2026
11 terms have ended since Aug 17, 2026

What they patent

The 5 largest of its 198 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Compositions Comprising Free-Standing Two-Dimensional Nanocrystals	5 in force	to Jun 2032
Modulation of Pre-Mrna Using Splice Modulating Oligonucleotides as Therapeutic Agents in the Treatment of Disease	5 in force	to Jan 2030
Physical Forms of Mxene Materials Exhibiting Novel Electrical and Optical Characteristics	4 in force	to Aug 2036
Polymerized Ionic Liquid Block Copolymers as Battery Membranes	4 in force	to Sep 2033
Novel D3 Dopamine Receptor Agonists to Treat Dyskinesia in Parkinson's Disease	4 in force	to Aug 2031

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,120,014	Nanowire Based Plasmonics In force Term ends Mar 12, 2027 · High confidence	In force	Term ends Mar 12, 2027	High confidence
US 8,137,650	Nanoporous Carbide Derived Carbon with Tunable Pore Size In force Term ends Apr 27, 2027 · High confidence	In force	Term ends Apr 27, 2027	High confidence
US 7,744,773	Freestanding Films with Electric Field-Enhanced Piezoelectric Coefficients In force Term ends May 25, 2027 · High confidence	In force	Term ends May 25, 2027	High confidence
US 9,352,984	Fluid Treatment Using Plasma Technology In force Term ends Jun 15, 2027 · High confidence	In force	Term ends Jun 15, 2027	High confidence
US 7,975,547	Method and Apparatus for Interfacial Sensing In force Term ends Jul 9, 2027 · High confidence	In force	Term ends Jul 9, 2027	High confidence
US 8,334,422	Method and Device for Air Disinfection and Sterilization In force Term ends Dec 30, 2027 · High confidence	In force	Term ends Dec 30, 2027	High confidence
US 8,639,311	Sensing Probe Comprising Multiple, Spatially Separate, Sensing Sites In force Term ends Jan 20, 2028 · High confidence	In force	Term ends Jan 20, 2028	High confidence
US 8,010,296	Apparatus and Method for Removing Non-Discriminatory Indices of an Indexed Dataset In force Term ends Feb 15, 2028 · High confidence	In force	Term ends Feb 15, 2028	High confidence
US 10,180,436	Diagnosis of Liver Pathology Through Assessment of Anti-Gal Igg Glycosylation In force Term ends Apr 4, 2028 · High confidence	In force	Term ends Apr 4, 2028	High confidence
US 9,480,409	Sensing Probe Comprising Multiple, Spatially Separate, Sensing Sites In force Term ends May 20, 2028 · High confidence	In force	Term ends May 20, 2028	High confidence

10 of 268 patents shown.

Pro members see all 268.

Pro members: see all 268 patents

Also on record, not counted in the 268: 37 patents in force now held by others · 190 patents ended · 150 applications pending · 319 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.

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Drexel University