The preserved file, along with the ack receipt, probably should be preserved for the life of any issued patent, that is for the term of the patent plus the statute of limitations (six years). The tab contains the MD5, SHA1 and CRC-32 file hashes. Hash databases are used to identify files. HashTab is a Windows shell extension which adds a tab called 'File Hashes' to the Windows Explorer file properties. These are common hashes that are used to verify the integrity and authenticity of files.
Given that EFS-Web or Patentcenter are likely to fail to actually preserve the uploaded file intact within IFW, you will probably want to make a special point of preserving the uploaded file locally in some very safe place. The Hash Database Management window is where you can set and update your hash database information. HashTab is a Windows shell extension which adds a tab called 'File Hashes' to the Windows Explorer file properties.
#Hashtab window pdf
If you were to upload this PDF file to EFS-Web or to Patentcenter, you could compare this hash with the hash appearing in the Ack Receipt. Having reached that folder, type a command line using the “certutil” ( Microsoft documentation) command like this:Ĭ:\temp>certutil -hashfile x-410.pdf sha512Ġa16c7693bc08c30c834e13f395747b2bd5e76acca111c0eb8e297ee9f43bdba2981ce2ac5cd2cad579c481442bb68f41989dd5d0f7085a7cd09c4528955d2dfĬertUtil: -hashfile command completed successfully. You can open a command line window and navigate to that folder. Suppose you wish to calculate the SHA-512 hash of this file (what the USPTO calls its “message digest”). Suppose you have a file called “x-410.pdf” on your hard drive and it is in your folder called “C:\temp”. One way to do this is with a command-line utility within Microsoft Windows. HashTab provides OS extensions to calculate file hashes and supports many hash algorithms such as MD5, SHA1, SHA2, RipeMD, HAVAL, and Whirlpool.
#Hashtab window how to
The practitioner wishing to independently check such things will thus be interested to know how to calculate a SHA-512 hash ( Wikipedia article, what the USPTO calls a “message digest”) of a PDF or DOCX file on the practitioner’s hard drive. In two recent blog articles ( here and here) I have called out the USPTO for programming Patentcenter so that its Acknowledgment Receipts list false information about what a filer uploaded in Patentcenter.
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