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3 posts
Netanel Drori
Last seen: 03/17/2021 - 13:21
Joined: 03/10/2021 - 11:08
Sequence variable and calculating the number of citations to each patent

Hello all,

I would appreciate the help of the community for any information on the following:

  1. In the cpc_current file (and in other files) there is a column titled “sequence” – what is the meaning of this variable?
  2. I want to calculate the number of citations to each patent in the “uspatentcitation” file (to each unique patent_id). Therefore, should I count how many times each patent_id appears in the file? Does each row represent one citation to patent_id?
  3. Is there a “read me” file for the various tables describing in detail each variable?

Thanks in advance to the respondents.

Netty

Wed, 03/17/2021 - 13:19
Russ
Last seen: 12/05/2024 - 10:08
Joined: 11/14/2017 - 22:15
DATA DICTIONARY ETC

Hi Netty,

It's easier to answer your questions out of order.

3. There is a link to a data dictionary (spreadsheet) on the downloads page (upper left side). 
1. A patent can have multiple cpc assignments. The data dictionary says that the sequence is the order in which cpc class appears in patent file.  So if a patent has 5 cpc assignments, it will have 5 rows in the file with sequences 0..4
2. I think you want to count how many times each citation_id is the file.  patent_id is the patent number that cites citation_id.  So if patent 123 cites 3 patents there will be 3 rows where the patent id is 123. Any number of patents could have a citation_id of 123.

Russ

Wed, 03/17/2021 - 13:22
Netanel Drori
Last seen: 03/17/2021 - 13:21
Joined: 03/10/2021 - 11:08
RUSS, THANK YOU SO MUCH! …

Russ, Thank you so much!

Your feedback really helped me.

Netty