The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1981
Filed:
Jun. 27, 1977
Applicant:
Inventors:
Joel A Joslin, Sunset Hills, MO (US);
Alan B Ranford, Des Peres, MO (US);
Assignee:
Sherwood Medical Industries Inc., St. Louis, MO (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
128766 ; 1282 / ;
Abstract
A blood collection tube is provided with a stopper adapted to be pierced by a needle cannula for introducing a sample of blood into the collection tube, and a valve disposed within the tube which allows blood to flow from the proximal end of the needle into the blood collection chamber of the tube but prevents the reflux of blood from the collection chamber to the patient.