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U.S. Patent and Trademark Office (USPTO)
No, the use of an attorney or registered agent is not required for filing a patent application. However, an attorney or registered agent is often a useful resource and the USPTO recommends the use of such for preparing a patent application and conducting the proceedings in the USPTO.
No, you don't need to hire a patent attorney. You can do the patent application for a United States Patent yourself, but remember that writing patent applications is a specialized skill, and there is a 50% rejection rate.
Hepatopetal denotes flow of blood towards the liver, which is the normal direction of blood flow through the portal vein. The term is typically used when discussing the portal vein or recanalized vein of the ligamentum teres in patients with suspected portal hypertension. It is the opposite of hepatofugal.
HEPATIC VEINS: The right, left, and middle hepatic veins are patent. The hepatic veins possess a triphasic waveform, with both respiratory variation and cardiac pulsatility. HEPATIC ARTERY: The hepatic artery is patent with a peak systolic velocity of 87 cm/s. (Normal hepatic artery velocity is 30-60 cm/s).
Hepatopetal denotes flow of blood towards the liver, which is the normal direction of blood flow through the portal vein. The term is typically used when discussing the portal vein or recanalized vein of the ligamentum teres in patients with suspected portal hypertension.
Patent track sign is a finding on color Doppler ultrasound, representing blood traveling along the course a biopsy needle track. It can occur after a biopsy of any organ, but is more often seen after liver or kidney biopsies.
If the vein compresses, this confirms that the vein is open and patent. If the vein does not compress and debris is seen within the vein, this confirms the presence of a blood clot or obstruction of the vein accounting for the patient's symptoms.
A normal portal venous flow is hepatopetal. A flow reversal (or a hepatofugal flow) is seen in the case of portal hypertension (Fig. 6).
No, the use of an attorney or registered agent is not required for filing a patent application. However, an attorney or registered agent is often a useful resource and the USPTO recommends the use of such for preparing a patent application and conducting the proceedings in the USPTO.