A blockchain token lifecycle mechanism: one token splits into two via a deliberate dual-block fork — both new blocks reference the same immediately preceding block, an intentional deviation from linear chain structure. The original token is permanently retired through a burn mechanism: the deprecated token is linked to a locked, dead-wallet identifier and excluded from all live ownership queries on the distributed ledger. Enriched financial metadata travels with the new tokens through the split.
Many real-world financial instruments naturally split over their lifecycle: a loan paid down over time changes its value split between principal and interest; a shared investment needs to be divided among multiple parties; an asset is sold at a ratio that doesn't match the original token denomination. Blockchain's append-only linear chain structure makes clean token splitting architecturally non-trivial.
The split mechanism creates a deliberate fork in the chain: instead of the next block referencing the immediately preceding block in a linear chain, two new blocks are generated that both reference the same preceding block. This is an intentional bifurcation — the distributed node network propagates both new blocks as the successors to the split point, each carrying a portion of the original token's value and metadata.
The burn mechanism is equally precise: the deprecated token (the original that was split) is assigned a locked wallet identifier — a permanent, immutable address that can never authorize a transfer. Critically, live ownership queries on the distributed ledger are structured to exclude tokens linked to locked wallet identifiers. The burned token doesn't just go to an unspendable address — it's categorically excluded from the active token set at query time.
Traditional blockchain structure is strictly linear: each new block references exactly one preceding block. The split mechanism deliberately breaks this constraint at the split point. The result is a fork with two successors — both are valid, both carry a portion of the original token's value and metadata, and the distributed network propagates both as the legitimate chain-tip pair.
The original token's block remains in the chain as the shared preceding block for both successors. Its metadata (original value, enriched financial attributes) is inherited and distributed across the two new tokens according to the split parameters. The smart contract can encode the split ratio and metadata distribution rules.
The distributed ledger system maintains enriched financial data as intrinsic properties of the token, not as external linked records. Metadata attributes include a loan value (the financial principal or face value of the underlying instrument), an interest rate (a percentage applying to the loan value), and an asset percentage (the fractional ownership stake this token represents in the underlying asset).
When a token splits, these metadata fields are inherited by each successor token — divided, maintained, or recalculated according to the split parameters. The metadata chain of custody is preserved: each successor token traces its enriched attributes back to the original token through the block reference chain. This eliminates the manual re-attachment step that breaks data continuity in conventional token burn-and-reissue approaches.
The financial principal or face value of the underlying instrument. Distributed across successor tokens according to split ratio. Provenance-linked to original token through block reference chain.
A percentage field applying to the loan value. Inherited by successor tokens on split — the yield obligation travels with the fractional claim. No manual re-attachment required after split.
The fractional ownership stake this token represents in the underlying asset. On split: recalculated for each successor token based on the split ratio. Maintains total asset claim continuity across all successors.
Each token block includes a Proof-of-Work nonce field. The distributed node network validates the nonce before accepting and propagating a new block — including both blocks in a dual-block fork split.
The four core lifecycle operations: a standard split, a smart contract triggered split, a burn with query exclusion, and distributed node propagation after a fork.
The distributed ledger's node network validates and propagates new blocks. In a standard linear chain, any block that references the same preceding block as an existing block is treated as a conflict and rejected. The split mechanism changes this: both successor blocks are valid, both reference the same preceding block by design, and the network consensus rules recognize a dual-fork as a legitimate split operation rather than a conflict.
Each node in the distributed network updates its local copy of the ledger to reflect both successor tokens as the chain-tip pair at the split point. The chain-tip reference — the indicator of the current end-of-chain state — advances to encompass both forks simultaneously. Subsequent transactions involving either successor token reference its specific block, maintaining clean chain provenance for each.
Node network consensus rules treat dual-block fork from a split operation as valid. Both successor blocks accepted and propagated. Standard fork-rejection rules do not apply to authorized split events.
After split: chain tip advances to a two-block head. Each node maintains both blocks as current chain state. Subsequent transactions reference either fork by its specific block hash.
Each of the two new successor blocks carries a Proof-of-Work nonce. Nodes validate both nonces before accepting and propagating the fork. Invalid nonce on either block rejects the split.
After burn: locked wallet assignment propagates to all nodes. Live query exclusion is network-wide. No node will return the burned token in active ownership scans — exclusion is distributed and consensus-enforced.
The split-and-burn mechanism solves a foundational problem for financial instrument tokenization: how do you divide ownership claims on a blockchain while maintaining provenance continuity and excluding retired tokens from active queries?
No forward citations found as of this check. US12236418B2 was granted February 2025 — citation data is still accumulating. Verify the current list on Google Patents.
Sole-inventor patents are relatively rare in institutional research environments, where collaborative invention is the norm. US12236418B2 represents a complete, independently conceived and prosecuted invention: the dual-block fork split mechanism, the locked-wallet burn with query exclusion, and the enriched metadata propagation framework — all developed and patented by a single inventor.
The 25-month prosecution period (January 2023 to February 2025) is consistent with the technical depth of the claims: distributed ledger consensus rules, block structure mechanics, and financial metadata continuity across split events are all non-trivial inventions that require thorough examination. The grant represents a clear allowance of the core dual-fork and query-exclusion claims.
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