However, if the claim is not found eligible at any of Pathways A, B or C, the claim is patent ineligible and should be rejected under 35 U.S.C. 101. Provides outreach and education for independent inventors who file patent applications without the assistance of a registered patent attorney orSevere percent stenosis in the proximal left anterior descending (LAD) coronary artery. This does not include collateral circulation. The saphenous graft with ostial stenosis. The American Heart Association explains the congenital heart defect patent ductus arteriosus, PDA, in children and adults. The US allows inventors to file a patent application for up to one year after public disclosure. The right ventricle pumps the blood into the pulmonary artery and blood reaches the aorta through a patent ductus arteriosus (see diagram). Prompt diagnosis and early treatment are essential to avoid significant complications or death.