Contains the information used to control patent documents. May also contain inventor's certificates, utility certificates, utility models, patents or certificates of addition, inventor's certificates of addition, utility certificates of addition, and published applications for any of these.
Patent documents are assigned numbers and dates relative to the process of applying for and being granted legal rights for an invention or discovery. This field includes information identifying the status of the patent document and country of source.
1st Indicator
Undefined. The 1st indicator position is undefined and contains a blank ( ).
Undefined
2nd Indicator
Undefined. The 2nd indicator position is undefined and contains a blank ( ).
Undefined
Subfields
‡a Number
The patent document number.
‡b Country
A country of publication code representing the country or jurisdiction associated with the patent document.
‡c Type of number
Designation of the type of patent document identifier.
013
91-13005 ‡b xxu ‡c patent ‡d 19920217
‡d Date
The date assigned by a competent authority (typically a patent office) reflecting when a patent or similar certificate was granted or upon acceptance of an application for such a grant by that authority. Other dates, such as effective dates, exhibition dates, etc., are also recorded. Multiple dates are recorded in separate occurrences of subfield ‡d if they all relate to the same patent document. Qualifying information is recorded in subfield ‡e. Date is recorded in the yyyymmdd format, for example, 19990911.
‡e Status information
Text that explains or clarifies the status of the patent document identified in the field.
The country or agency that is party to the document, usually an application of patent or related document. This subfield may contain a code identifying a country or, when appropriate, an organization (generally an international one).