Members of the Patent Cooperation Treaty (PCT)

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The PCT now has 153 contracting states.

PCT Map
Two Letter Code Name of State Date on which state became bound by the PCT1
AE United Arab Emirates 10 March 1999
AG Antigua and Barbuda 17 March 2000
AL Albania 4 October 1995
AM Armenia2 25 December 1991
AO Angola 27 December 2007
AT Austria 23 April 1979
AU Australia 31 March 1980
AZ Azerbaijan 25 December 1995
BA Bosnia and Herzegovina 7 September 1996
BB Barbados 12 March 1985
BE Belgium 14 December 1981
BF Burkina Faso 21 March 1989
BG Bulgaria 21 May 1984
BH Bahrain2 18 March 2007
BJ Benin 26 February 1987
BN Brunei Darussalam 24 July 2012
BR Brazil 9 April 1978
BW Botswana 30 October 2003
BY Belarus2 25 December 1991
BZ Belize 17 June 2000
CA Canada 2 January 1990
CF Central African Republic 24 January 1978
CG Congo 24 January 1978
CH Switzerland 24 January 1978
CI Côte d’Ivoire 30 April 1991
CL Chile2 2 June 2009
CM Cameroon 24 January 1978
CN China 3, 4 1 January 1994
CO Colombia 28 February 2001
CR Costa Rica 3 August 1999
CU Cuba2 16 July 1996
CY Cyprus 1 April 1998
CZ Czech Republic 1 January 1993
DE Germany 24 January 1978
DJ Djibouti 23 September 2016
DK Denmark 1 December 1978
DM Dominica 7 August 1999
DO Dominican Republic 28 May 2007
DZ Algeria2 8 March 2000
EC Ecuador 7 May 2001
EE Estonia 24 August 1994
EG Egypt 6 September 2003
ES Spain 16 November 1989
FI Finland5 1 October 1980
FR France2, 6 25 February 1978
GA Gabon 24 January 1978
GB United Kingdom7 24 January 1978
GD Grenada 22 September 1998
GE Georgia2 25 December 1991
GH Ghana 26 February 1997
GM Gambia 9 December 1997
GN Guinea 27 May 1991
GQ Equatorial Guinea 17 July 2001
GR Greece 9 October 1990
GT Guatemala 14 October 2006
GW Guinea-Bissau 12 December 1997
HN Honduras 20 June 2006
HR Croatia 1 July 1998
HU Hungary2 27 June 1980
ID Indonesia2 5 September 1997
IE Ireland 1 August 1992
IL Israel 1 June 1996
IN India 2 7 December 1998
IR Iran (Islamic Republic of) 4 October 2013
IS Iceland 23 March 1995
IT Italy 28 March 1985
JO Jordan (will become bound on 9 June 2017)
JP Japan 1 October 1978
KE Kenya 8 June 1994
KG Kyrgyzstan2 25 December 1991
KH Cambodia (will become bound on 8 December 2016)
KM Comoros 3 April 2005
KN Saint Kitts and Nevis 27 October 2005
KP Democratic People’s Republic of Korea 8 July 1980
KR Republic of Korea 10 August 1984
KW Kuwait 9 September 2016
KZ Kazakhstan2 25 December 1991
LA Lao People’s Democratic Republic2 14 June 2006
LC Saint Lucia2 30 August 1996
LI Liechtenstein 19 March 1980
LK Sri Lanka 26 February 1982
LR Liberia 27 August 1994
LS Lesotho 21 October 1995
LT Lithuania 5 July 1994
LU Luxembourg 30 April 1978
LV Latvia 7 September 1993
LY Libya 15 September 2005
MA Morocco 8 October 1999
MC Monaco 22 June 1979
MD Republic of Moldova2 25 December 1991
ME Montenegro 3 June 2006
MG Madagascar 24 January 1978
MK The former Yugoslav Republic of Macedonia 10 August 1995
ML Mali 19 October 1984
MN Mongolia 27 May 1991
MR Mauritania 13 April 1983
MT Malta2 1 March 2007
MW Malawi 24 January 1978
MX Mexico 1 January 1995
MY Malaysia2 16 August 2006
MZ Mozambique2 18 May 2000
NA Namibia 1 January 2004
NE Niger 21 March 1993
NG Nigeria 8 May 2005
NI Nicaragua 6 March 2003
NL Netherlands8 10 July 1979
NO Norway5 1 January 1980
NZ New Zealand 1 December 1992
OM Oman2 26 October 2001
PA Panama 7 September 2012
PE Peru 6 June 2009
PG Papua New Guinea 14 June 2003
PH Philippines 17 August 2001
PL Poland5 25 December 1990
PT Portugal 24 November 1992
QA Qatar 2  3 August 2011
RO Romania2 23 July 1979
RS Serbia9 1 February 1997
RU Russian Federation2 29 March 197810
RW Rwanda 31 August 2011
SA Saudi Arabia 3 August 2013
SC Seychelles 7 November 2002
SD Sudan 16 April 1984
SE Sweden5 17 May 1978
SG Singapore 23 February 1995
SI Slovenia 1 March 1994
SK Slovakia 1 January 1993
SL Sierra Leone 17 June 1997
SM San Marino 14 December 2004
SN Senegal 24 January 1978
ST Sao Tome and Principe 3 July 2008
SV El Salvador 17 August 2006
SY Syrian Arab Republic 26 June 2003
SZ Swaziland 20 September 1994
TD Chad 24 January 1978
TG Togo 24 January 1978
TH Thailand2 24 December 2009
TJ Tajikistan2 25 December 1991
TM Turkmenistan2 25 December 1991
TN Tunisia2 10 December 2001
TR Turkey 1 January 1996
TT Trinidad and Tobago 10 March 1994
TZ United Republic of Tanzania 14 September 1999
UA Ukraine2 25 December 1991
UG Uganda 9 February 1995
US United States of America11,12 24 January 1978
UZ Uzbekistan2 25 December 1991
VC Saint Vincent and the Grenadines2  6 August 2002
VN Viet Nam   10 March 1993
WS Samoa2 2 January 2020
ZA South Africa2 16 March 1999
ZM Zambia 15 November 2001
ZW Zimbabwe 11 June 1997

  1. All PCT Contracting States are bound by Chapter II of the PCT relating to the international preliminary examination.
  2. With the declaration provided for in PCT Article 64(5). 
  3. Applies also to Hong Kong, China with effect from 1 July 1997.
  4. Not applicable to Macau, China.
  5. With the declaration provided for in PCT Article 64(2)(a)(ii) .
  6. Including all Overseas Departments and Territories.
  7. The United Kingdom extended the application of the PCT to the Isle of Man with effect from 29 October 1983.
  8. Ratification for the Kingdom in Europe, the Netherlands Antilles and Aruba. The Netherlands Antilles ceased to exist on 10 October 2010. As from that date, the PCT continues to apply to Curaçao and Sint Maarten. The PCT also continues to apply to the islands of Bonaire, Sint Eustatius and Saba which, with effect from 10 October 2010, have become part of the territory of the Kingdom of the Netherlands in Europe.
  9. Serbia is the continuing State from Serbia and Montenegro as from 3 June 2006.
  10. Date of ratification of the Soviet Union, continued by the Russian Federation as from 25 December 1991.
  11. With the declarations provided for in PCT Articles 64(3)(a) and 64(4)(a).
  12. Extends to all areas for which the United States of America has international responsibility.
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