Patent Yard Sign in
Expired Canadian patentCanada

Assay of gram-negative bacteria

CA 1114271 A · Owner: President And Fellows Of Harvard College · Inventors: Du Moulin, Gary C.; Hedley-Whyte, John; Lynch, Susan E.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A procedure and kit for assay of Gram-negative bacteria in biological fluids by lysing cells in the fluid at pH 6 to 8 removing cellular debris, sedimenting microorganisms from the liquid phase at 5,000 G or more incubat-, ing the microorganisms with Limulus polyphemus amebocyte lysate in aqueous medium, and measuring the amount of resultant turbidity.

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 19, 1979
GrantedDecember 15, 1981
Term endedDecember 15, 1998
Patent numberCA 1114271 A
Classification (IPC)C12Q1/04 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedApril 19, 1979Patent grantedDec 15, 1981Term endedDec 15, 1998

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.