488 patents currently held
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Mar 2034. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2034
Next term end
284
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 Feb 2037 · High confidence
Also notable
Ends May 2037 · High confidence
Also notable
Ends Jul 2037 · High confidence
Secure Multiparty Loss Resistant Storage and Transfer of Cryptographic Keys for Blockchain Based Systems in Conjunction with a Wallet Management System
US 10,659,223
Cited by 181 later US patents, top 1% of utility patents granted in 2020 in our data. Protection runs to 2037.
Determining a Common Secret for the Secure Exchange of Information and Hierarchical, Deterministic Cryptographic Keys
US 10,652,014
Cited by 44 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2037.
Blockchain Implemented Counting System and Method for Use in Secure Voting and Distribution
US 11,347,838
Cited by 51 later US patents, top 5% of utility patents granted in 2022 in our data. Protection runs to 2037.
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.
- 5 fees due Dec 6 to 27, 2026 · next Dec 6
- 4 fees due Jan 4, 2027
- 6 fees due Feb 8 to 28, 2027 · next Feb 8
- 2 fees due Mar 12 to 19, 2027 · next Mar 12
- 8 fees due Apr 3 to 24, 2027 · next Apr 3
- 6 fees due May 7 to 28, 2027 · next May 7
- 6 fees due Jun 5 to 26, 2027 · next Jun 5
- 10 fees due Jul 2 to 30, 2027 · next Jul 2
- 12 fees due Aug 6 to 27, 2027 · next Aug 6
- 9 fees due Sep 3 to 26, 2027 · next Sep 3
- 3 fees due Oct 23 to 30, 2027 · next Oct 23
- 7 fees due Nov 7 to 12, 2027 · next Nov 7
Recent changes
- Oct 14Assignment recorded on 1 record: nChain Holdings Ltd. to nChain Licensing AG Recorded Oct 14, 2026, executed Nov 25, 2020. Conveyance as recorded: Change of Name. A recorded assignment is a filed document, not a statement of current ownership. Reel 76665, frame 704.
- 35 of the patents on this record were granted since Aug 16, 2026
- 3 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 284 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 10,776,761 | Virtual Currency System In force · High confidence | In force | High confidence | |
| US 9,398,018 | Virtual Currency System In force · High confidence | In force | High confidence | |
| US 10,659,223 | Secure Multiparty Loss Resistant Storage and Transfer of Cryptographic Keys for Blockchain Based Systems in Conjunction with a Wallet Management System In force · High confidence | In force | High confidence | |
| US 10,715,336 | Personal Device Security Using Elliptic Curve Cryptography for Secret Sharing In force · High confidence | In force | High confidence | |
| US 11,621,833 | Secure Multiparty Loss Resistant Storage and Transfer of Cryptographic Keys for Blockchain Based Systems in Conjunction with a Wallet Management System In force · High confidence | In force | High confidence | |
| US 11,755,718 | Blockchain Implemented Counting System and Method for Use in Secure Voting and Distribution In force · High confidence | In force | High confidence | |
| US 12,032,677 | Agent-Based Turing Complete Transactions Integrating Feedback Within a Blockchain System In force · High confidence | In force | High confidence | |
| US 12,182,805 | Tokenisation Method and System for Implementing Exchanges on a Blockchain In force · High confidence | In force | High confidence | |
| US 12,248,539 | Method and System for Securing Computer Software Using a Distributed Hash Table and a Blockchain In force · High confidence | In force | High confidence | |
| US 12,271,466 | Blockchain Implemented Counting System and Method for Use in Secure Voting and Distribution In force · High confidence | In force | High confidence |
Also on record, not counted in the 488: 1 patent in force now held by others · 7 patents ended · 218 applications pending · 82 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.