From d230a2b4efcff0b59d08df0506e4a3fec44d80f1 Mon Sep 17 00:00:00 2001
From: "Claude Sonnet 4.6" <noreply@anthropic.com>
Date: Sun, 5 Apr 2026 22:23:59 +0000
Subject: [PATCH] fix: add kind code fallback for legal_status extraction
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When DOM-based legal_status extraction fails, derive status from
the patent ID kind code: A* → Pending, B* → Active.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 src/core/scripts/extract_patent.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/core/scripts/extract_patent.js b/src/core/scripts/extract_patent.js
index c8d019e..3affd18 100644
--- a/src/core/scripts/extract_patent.js
+++ b/src/core/scripts/extract_patent.js
@@ -267,6 +267,20 @@
         }
     }
 
+    // Method 4: Fallback - derive from patent ID kind code
+    if (!legalStatus) {
+        const patentId = new URL(window.location.href).pathname.split('/').pop();
+        const kindMatch = patentId.match(/([A-Z]\d*)$/);
+        if (kindMatch) {
+            const kc = kindMatch[1].toUpperCase();
+            if (kc.startsWith('A')) {
+                legalStatus = 'Pending';
+            } else if (kc.startsWith('B')) {
+                legalStatus = 'Active';
+            }
+        }
+    }
+
     return {
         title: title,
         abstract: abstract,