Help: Administrative Status

Administrative status information includes the following status fields and dates ] associated with the processing of patent applications:


(22) Filed, (86) PCT Filing Date

The date the patent application was filed. If it is a PCT originating application, then it is the same date as the PCT filing date.

On this site, for divisional patents, where the application was filed before October 1, 1989, the date recorded as the filing date may be the date the divisional application was received, rather then the legal filing date of the parent application. Similarly for reissue patents, where the application was filed before October 1, 1989, the date recorded as the filing date may be the date the request for reissue was received, rather than the legal filed date of the surrendered patent.

(85) National Entry

The date that a PCT originating application entered the Canadian national phase.

(41) Open to Public Inspection, (87) PCT Publication Date

Patent applications filed since October 1, 1989, are open to public inspection.

Applications filed on or after October 1, 1989, are made available to the public 18 months after the priority date, or, if there is no priority, 18 months after the filed date, unless the applicant has requested early open to public inspection date.

If the application is PCT originating, then the open to public inspection date will normally be the same as the PCT publication date.

Examination Requested

The date on which a request was made to have an application examined. This applies only to applications filed on or after October 1, 1989. For applications filed on or after October 1, 1996, the request must be made within 5 years from the filed date of the application. For applications filed between October 1, 1989 and September 30, 1996, the request must be made within 7 years from the filing date of the application.

Withdrawn Application

The date that an application open to public inspection was withdrawn at the request of the applicant.

Correction of Withdrawn

The date that the withdrawn status was reversed, usually to correct a situation where the application was erroneously withdrawn by the Patent Office.

Dead Application

The date that an abandoned application could normally no longer be reinstated.

Correction of Dead Application

The date that the dead status was reversed, usually to correct a situation where the application erroneously became dead.

(45) Issued

The date an application becomes a patent.

Re-examination Certificate

The date that a re-examination certificate has been issued for a patent, with changes to the patent as originally issued.

Reissued

The date that a patent was reissued after the original patent was surrendered by the patentee. For patents that were filed on or after October 1,1989, the patent number remains the same as the original patent. For patents that were filed before October 1,1989, the patent reissues with a new number. In both cases the term of the patent remains the same as the original patent.

A reissue can occur occasionally and under strict conditions, when a patentee surrenders what is believed to be a defective patent to the Patent Office in order to have the defect fixed. The surrendered patent undergoes further examination and may subsequently be re-allowed and reissued.

On extremely rare occasions a patent document may have multiple reissued dates. This site displays only the last reissue date. In order to determine if the patent has been reissued more than once, the cover page Image of the patent must be accessed.

Surrendered

The date the original patent was surrendered and no longer is in force.

Correction of Surrendered

The date that the surrendered status was reversed, used exceptionally to correct a situation where the patent erroneously shows a surrendered status.

Lapsed

The day at the end of which the patent term expired, pursuant to subsection 46(2) of the Patent Act, for failure to pay maintenance fees (this applies only to patents issued after October 1, 1989).

Correction of Lapsed

The date that the lapsed status was reversed; usually to correct a situation where our records erroneously indicated that the patent was lapsed.

Expired

In cases where all maintenance fees required by section 46 of the Patent Act were paid, the day at the end of which the patent term expired, pursuant to section 44 or 45 of the Patent Act.

Correction of Expired

The date that the expired status was reversed; usually to correct a situation where our records erroneously indicated that the patent was expired.