Filed under: Patent expiry
Patent expiry dates are diffferent for different countries…..
Australia(AU)
Add 20 years to application date shown on front page of patent (INID code 22) to obtain full-term expiry date.
Canada(CA)
For patents based on applications filed before 01/10/1989 (INID Code 22 or 86): Add 17 years to patent issue date shown on front page of patent (INID code 45) to obtain first date, then add 20 years to application date shown on front page of patent (INID code 22 or 86) to obtain second date. The later of these two dates is the full-term expiry date. N.B. This does not apply to patents with an issue date (INID code 45) prior to 12/07/1984, all of which have now expired.
For patents based on applications filed on or after 01/10/1989 (INID Code 22 or 86): Add 20 years to application date shown on front page of patent (INID code 22 or 86) to obtain full-term expiry date.
Germany (DD/DE/EP)
For DD patents applied for before 01/07/1990 (INID Code 22):
Add 18 years to application date shown on front page of patent (INID code 22) to obtain full-term expiry date.
For DD patents applied for on or after 1/7/1990 (INID Code 22) & all DE/EP patents:
Add 20 years plus one day to application date shown on front page of patent (INID code 22) to obtain full-term expiry date. N.B. DD or DE patents now apply to both former East Germany and West Germany.
Spain (ES/EP)
For patents applied for before 26/06/1986 (INID Code 22):
Add 20 years to grant date shown on front page of patent (INID code 45) to obtain full-term expiry date.
For patents applied for on or after 26/06/1986 (INID Code 22):
Add 20 years to application date shown on front page of ES or EP patent (INID code 22) to obtain full-term expiry date.
France (FR/EP)
Add 20 years to application date shown on front page of patent (INID code 22) to obtain full-term expiry date.
United Kingdom (UK/EP)
Add 20 years to application date shown on front page of patent (INID code 22) to obtain full-term expiry date. Extensions (maximum 5 years) are allowed for pharmaceutical patents in this country.
United States of America (US)
For patents based on applications filed before 08/06/1995 (INID Code 22):
Add 17 years to patent issue date shown on front page of patent (INID code 45) to obtain first date (take note of any terminal disclaimer denoted by an asterix; for reissued patents use original issue date shown under INID code 64). Next add 20 years to the application date of the earliest related application shown on front page of patent (INID codes 62 or 63) to obtain second date. The later of these two dates is the full-term expiry date.
For patents based on applications filed after 08/06/1995 (INID Code 22):
Add 20 years to the date of the earliest related application shown on front page of patent (INID code 65) to obtain full-term expiry.
