China legal tool China law National framework

China Patent Term Adjustment
& Pharmaceutical Extension Calculator

Interactive China legal orientation tool. Review the result with the relevant legal guide and qualified counsel where facts or local implementation matter.

Free calculatorPRC lawAssumption-led estimate

01Enter facts
02Get estimate
03Check assumptions
04Verify or escalate

Patent term adjustment / extension

Route

Patent filing date

Substantive examination request date

Grant date

Applicant-caused unreasonable delay days to exclude

For PTE: China new-drug marketing approval date

For PTE: requested extension days (after regulatory calculation)

PTA/PTE request filing date

Legal basis

CNIPA calculation controls

Actual PTA/PTE uses Patent Law Implementing Regulations and CNIPA rules on excluded periods, request deadlines and qualifying patents/drugs. This tool provides the statutory outer screen, not the official final CNIPA day count.

Legal authorityReview the legal-basis section and cited source before relying on the output.

Tool typeCalculator

ScopeNational framework first

Local checkLocal rules and authority practice may differ

Use the output safely

Verify before relying on the result.

InputsConfirm dates, amounts, classifications and assumptions.
AuthorityCheck the cited rule, effective date and territorial scope.
EscalationSeek review for disputed facts, material exposure or imminent deadlines.

When the file needs review

Move from the tool to a verified legal route.

Use the output to organize the facts, then confirm the source, evidence, local implementation and available remedy before acting.

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