26 patents currently held
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.
The next term ends in Aug 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
4
Ending by 2030
Aug 2027
Next term end
16
Patent families
When these terms end
Held patents by the year their term ends
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
Notable
Ends Mar 2036 · High confidence
Also notable
Ends Jun 2031 · High confidence
Also notable
Ends Jun 2031 · High confidence
Acetate Salt of Buprenorphine and Methods for Preparing Buprenorphine
US 9,926,329
Cited by 15 later US patents, top 25% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2036.
Process for N-Dealkylation of Tertiary Amines
US 8,921,556
Renewed at every maintenance window since the 2014 grant; no more fees are due before its term ends in 2031.
Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof
US 9,127,014
The largest patent family in this portfolio, 6 related applications, renewed at every maintenance window due so far. Protection runs to 2031.
Formerly held, still cited
Notable
Ends Jun 2036 · High confidence
Cited by 35 later US patents, top 10% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2036.
now held by Purisys LLC
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.
- 2 fees due Mar 8 to 10, 2027 · next Mar 8
- 1 fee due Jul 28, 2027The maintenance fee for Process for the Preparation of Lisdexamfetamine and Related Derivatives (US 10,544,434) comes due Jul 28, 2027. Unpaid by Jan 28, 2028, it lapses early.
- 3 fees due Oct 12 to 21, 2027 · next Oct 12
Recent changes
- 1 term has ended since Aug 16, 2026
What they patent
The 5 largest of its 16 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Acetate Salt of Buprenorphine and Methods for Preparing Buprenorphine | 5 in force | to Mar 2036 |
| Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof | 5 in force | to Jun 2031 |
| Process for N-Dealkylation of Tertiary Amines | 2 in force | to Jun 2031 |
| Process for Preparing Oxycodone Having Reduced Levels of 14-Hydroxycodeinone | 2 in force | to Oct 2029 |
| Hydrocodone Base and Methods for Its Purification | 1 in force | to Mar 2038 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,227,609 | Process for Purifying Noroxymorphone Compounds held by Noramco GmbH In force · High confidence | In force | High confidence | |
| US 8,058,439 | Process for Preparing Oxycodone Having Reduced Levels of 14- Hydroxycodeinone In force · High confidence | In force | High confidence | |
| US 7,875,719 | Process for Reducing Impurities in Oxycodone Base In force · High confidence | In force | High confidence | |
| US 7,906,647 | Process for Preparing Oxycodone Having Reduced Levels of 14-Hydroxycodeinone In force · High confidence | In force | High confidence | |
| US 8,921,556 | Process for N-Dealkylation of Tertiary Amines In force · High confidence | In force | High confidence | |
| US 9,127,014 | Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof In force · High confidence | In force | High confidence | |
| US 9,309,258 | Process for N-Dealkylation of Tertiary Amines In force · High confidence | In force | High confidence | |
| US 9,499,557 | Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof In force · High confidence | In force | High confidence | |
| US 9,593,124 | Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof In force · High confidence | In force | High confidence | |
| US 9,624,232 | Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof In force · High confidence | In force | High confidence |
Also on record, not counted in the 26: 4 patents in force now held by others · 7 patents ended · 2 applications pending · 8 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.