Where to File Your Patent First?

Where to file your patent first — a strategic decision shaping the entire global portfolio. Vietnam, China, India: each offers distinct advantages and constraints. This article analyses how to choose correctly.

1. Why the first-filing country matters

Priority date: the first filing date — the prior-art cut-off;
Priority right: 12 months — under the Paris Convention for later filings;
Constraints: the first country’s rules — affecting later filings;
Language: the original text — deciding application quality;
Cost: cheap first filing — or expensive;
Strategy: never random — must be calculated.

2. Priority rights under the Paris Convention

Content: 12 months — filing elsewhere keeping the priority date;
Members: all three countries — Vietnam, China, India;
Effect: against disclosures — within the 12 months;
Condition: the same applicant — the same invention;
Claiming: declaring priority — on later filings;
Missing: beyond 12 months — priority lost.

3. Filing first in Vietnam: when does it make sense?

Pro: low cost — drafting and fees (qualitative);
Language: Vietnamese — if the team is Vietnamese;
R&D in Vietnam: inventions made in Vietnam — natural first filing;
Con: slow examination — long waits (qualitative);
Search report: little value — for later filings;
Fit: Vietnamese businesses — domestic R&D.

4. Filing first in China: when does it make sense?

Pro: a large system — quality examination;
R&D in China: factories, research institutes — in China;
Constraint: confidentiality examination — inventions completed in China must pass it before filing abroad;
Details: ask Chinese counsel — on sequence and timing;
Language: Chinese — costly translation;
Fit: groups with R&D — in China.

5. Filing first in India: when does it make sense?

Pro: low cost — (qualitative);
IT, pharma: strengths — information technology, pharmaceuticals;
English: English-language filings — convenient;
Constraints: its own rules — ask Indian advisers;
Market: India is large — market protection;
Fit: R&D or market — in India.

6. Manufacturing country first or market first?

School 1: the manufacturing country — where the invention arose;
School 2: the biggest market — where goods sell;
Reality: combining — weighing legal constraints;
China constraint: confidentiality examination — if R&D in China;
Decide: the R&D map — and the market map;
Advice: patent counsel — overall strategy.

7. Idea-theft risks while pending

Gap: 18 months — to publication (general frame);
Risk: competitors reading — published applications;
Prevention: keeping secret — before filing;
Contracts: NDAs — with everyone exposed;
Speed: fast commercialisation — before copying;
Watch: monitoring — competitors’ filings.

8. The PCT route after first filing

File PCT: within 12 months — claiming priority;
International search: the report — assessing prospects;
Delay: 30 months — to national phases (general frame);
Benefit: decision time — on which markets;
Cost: high — but flexible;
All three: all PCT members — phases available.

9. Translation and agent costs per country

Vietnam: Vietnamese — moderate cost;
China: Chinese — expensive specialist translation;
India: English — saving if originally English;
Agents: service fees — varying per country;
Total: counting everything — the patent lifecycle;
Budget: budgeting — before first filing.

10. Examination quality per country

China: huge scale — many examiners;
India: improving — in recent years;
Vietnam: strengthening — capacity;
Impact: strong patents — easier to enforce;
Qualitative: no absolute — ranking;
Reality: asking practitioners — experience.

11. How examination time affects strategy

Fast: early grant — early enforcement;
Slow: pending rights — hard to sue;
Fast-track: mechanisms — some countries have;
Plan: product launch — synchronised;
Investors: granted patents — raising fundraising value;
Balance: speed vs cost — vs quality.

12. Should you use provisional applications?

Concept: provisional applications — securing a filing date;
Where: some countries — not all;
Benefit: cheap and fast — holding the place;
Limit: must file complete — within the term;
Strategy: combining — with formal filings;
Ask: agents — per country.

13. Confidentiality before filing

Principle: prior disclosure — destroys novelty;
Exceptions: exhibitions, scientific publications — grace periods in some countries;
Practice: absolute silence — before filing;
Staff: NDAs — with R&D employees;
Partners: confidentiality agreements — before exchanges;
Incidents: handling at once — if leaked.

14. Cross-border patent co-ownership

Common: joint R&D — Vietnam-China-India;
Agree: allocating rights — clearly;
Filing: who is named — first filing;
Cost: sharing — per agreement;
Exploit: each party’s use rights;
Disputes: resolution mechanisms — upfront.

15. Transferring the right to file

Scenario: employee-created — who owns;
Employment contracts: IP clauses — clear;
Transfer: written — assignment of filing rights;
Record: recordal — at the office;
Cross-border: legalising — documents;
Prevention: on hiring — signing agreements.

16. Multi-country portfolio strategy

Map: R&D, manufacturing, markets — three layers;
Prioritise: core patents — broad protection;
Secondary: minor improvements — selective;
Budget: allocating — by value;
Maintain: periodic reviews — dropping weak patents;
Manage: systems — tracking deadlines.

17. Quick three-country comparison

First-filing cost: Vietnam, India low — China higher (qualitative);
Constraints: China’s confidentiality examination — note;
Language: India’s English — convenient;
Markets: all three large — by sector;
Conclusion: no universal answer — case by case;
Rule: where the R&D is — consider filing first there.

18. Mistakes in choosing the first-filing country

Random: no strategy — anywhere will do;
Ignoring constraints: China’s confidentiality examination — breaching;
Slow: disclosing first — losing novelty;
False economy: cheap but wrong — market;
No PCT: missing — the international route;
No advice: deciding alone — lacking expertise.

19. Recommended roadmap for Chinese investors

R&D in China: complying with confidentiality examination — then filing;
Manufacturing in Vietnam: filing in Vietnam — protection;
PCT: within 12 months — expanding;
Markets: entering phases — consuming countries;
Maintain: monitoring — the whole portfolio;
Lawyers: alongside — from the start.

20. First-filing-country checklist

Where is the R&D — identified?
Legal constraints — researched?
Key markets — defined?
Budget — prepared?
PCT — considered?
Advice — sought?

21. Divisional applications: splitting strategy

Concept: dividing — one application into several;
Use: multiple inventions — in one filing;
Timing: before grant — of the parent;
Benefit: separate — prosecution paths;
Cost: extra fees — per division;
Strategy: keeping alive — fallback positions.

22. Patent term extensions: are they available?

Concept: extending — beyond 20 years;
Pharma: regulatory delays — compensation;
Countries: varying — availability;
Ask: per country — advisers;
Plan: factoring — into lifecycle;
Reality: limited — generally.

23. Grace periods for pre-filing disclosures

Concept: grace periods — excusing disclosures;
Varying: 6 or 12 months — by country;
Conditions: specific — circumstances;
Risk: relying on grace — dangerous;
Advice: file first — disclose later;
Check: per country — rules.

24. Invention promotion and inventor remuneration

Reward: inventor rewards — required;
Amount: reasonable — remuneration;
Disputes: inventor claims — arising;
Policy: company policies — clear;
China: specific rules — ask counsel;
Document: agreements — with inventors.

25. First-filing quality checklist

Search: prior art — searched;
Draft: claims — proper breadth;
Drawings: clear — figures;
Translation: accurate — translations;
Formalities: compliant — forms;
File: deadlines — observed.

26. Working with patent attorneys

Choose: sector-experienced — attorneys;
Brief: full invention disclosures — providing;
Review: draft claims — reviewing;
Coordinate: multi-country — filings.

Contact us

FLAT Law Firm advises Chinese investors throughout the Vietnam investment cycle — from deal structuring and licensing to operations and compliance. Contact us for advice tailored to your project.

This article has been quality-reviewed by the FLAW AI Legal Council