[mw] Fix access to USPTO documents using USPTO PPUBS

USPTO PatFT and AppFT are deprecated.

On September 30 2022, the United States Patent and Trademark Office’s
(USPTO) new Patent Public Search tool (PPUBS) replaced four legacy
tools—Public-Examiner’s Automated Search Tool (PubEAST), Public-Web-
based Examiner’s Search Tool (PubWEST), Patent Full-Text and Image
Database (PatFT), and Patent Application Full-Text and Image Database
(AppFT).

See also https://meta.ip-tools.org/t/178.

.gitignore

@@ -16,3 +16,4 @@ coverage.xml
 o-*.min.js
 o-*.min.map
 yarn-error.log
+patzilla-uspto-cache.sqlite

CHANGES.rst

@@ -49,6 +49,7 @@ Development
 - [mw] Add CLI interface for basic operations on EPO/OPS
 - [mw] Fix access to DPMAregister due to upstream changes
 - [mw] Add CLI interface for search operation on IFI CLAIMS
+- [mw] Fix access to USPTO documents using USPTO PPUBS, PatFT and AppFT are deprecated
 
 
 2019-11-01 0.169.3

patzilla/access/uspto/image.py

@@ -31,8 +31,7 @@
 import logging
 import sys
 
-from patzilla.access.uspto.pdf import fetch_pdf, UsptoPdfSection, run_examples
-from patzilla.util.image.convert import pdf_extract_image
+from patzilla.access.uspto.pdf import fetch_png, run_examples, UsptoPdfSection
 
 log = logging.getLogger(__name__)
 
@@ -45,9 +44,7 @@ def fetch_first_drawing(patent):
         docnumber = patent
 
     log.info('Fetching first drawing of document {docnumber}'.format(docnumber=docnumber))
-    drawing_pdf = fetch_pdf(docnumber, section=UsptoPdfSection.DRAWINGS)
-    drawing_tiff = pdf_extract_image(drawing_pdf)
-    return drawing_tiff
+    return fetch_png(docnumber, section=UsptoPdfSection.DRAWINGS)
 
 
 if __name__ == '__main__':  # pragma: nocover