Patents by Inventor Richard L. Nelson, Jr.

Richard L. Nelson, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gastrointestinal tube with inflatable bolus
    Patent number: 5318530
    Abstract: An intestinal catheter is inserted into the gastrointestinal tract by use of an endoscope or a guidewire in combination with an inflatable bolus and performs the functions of aspirating the stomach and feeding the small intestine. The inflatable bolus may be filled with a heavy liquid such as water so that the downstream end of the catheter is moved through the gastrointestinal tract by peristalsis.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: June 7, 1994
    Assignee: Bissel Medical Products, Inc.
    Inventor: Richard L. Nelson, Jr.
  • Wire guided intestinal catheter
    Patent number: 5078701
    Abstract: An intestinal catheter is inserted into the gastrointestinal tract by use of a guide wire and performs the functions of aspirating the stomach and feeding the small intestine. A feeding lumen communicates with an opening in the downstream end of the catheter. The guide wire can be inserted in the feeding lumen of the catheter when emplacing the catheter into a patient's gastrointestinal tract.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: January 7, 1992
    Assignee: Bissell Medical Products, Inc.
    Inventors: Clement J. Grassi, Richard L. Nelson, Jr.
  • Long intestinal catheter with sump
    Patent number: 4676778
    Abstract: A long intestinal catheter is readily insertable into the small intestine via the nasogastric route. The tube aspirates the small intestine during the operative period, internally plicates the small intestine after surgery, and can aspirate the stomach and the small intestine during the post-operative period. The tube is self-sumping and avoids blockage or closure of any aspirating opening in the tube by the interior lining of the stomach or small intestine during aspiration.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: June 30, 1987
    Inventor: Richard L. Nelson, Jr.
  • Long intestinal catheter
    Patent number: 4368739
    Abstract: A catheter for insertion into the small intestine via the nose, the esophagus, the stomach and the duodenum. The catheter has a pair of inflatable balloons, a first one at its downstream end, and another a short distance (10 inches or 25 cm.) upstream of the first one. The two balloons are inflated when the catheter approaches the duodenum to facilitate passage through a portion of the duodenum which is inaccessible to a doctor who has access to the jejunum during surgery. The catheter may be advanced through the small intestine by grasping one or the other of the inflated balloons through the wall of the small intestine. When one of the balloons is in the inaccessible portion of the duodenum, the other is accessible, and vice versa.
    Type: Grant
    Filed: April 29, 1981
    Date of Patent: January 18, 1983
    Inventor: Richard L. Nelson, Jr.