Patent · US Expired

Multilayer analytical element and method of making, using ultrasonic or laser energy

US4776904A · kind A · utility

107Cited by
9References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 19, 1985
Grant dateOct 11, 1988
Priority date—
Expiry dateJul 19, 2005

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S435/805
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method of making a multilayer analytical test element comprises providing layers at least one of which is responsive to detect a ligand in a liquid sample, or to detect the ligand binding capacity of the sample, and at least one other layer that is fusible when subjected to sonic energy, arranging the layers one on top of the other together to form a composite blank of layers, subjecting the composite to ultrasonic or laser energy to cut the composite to the desired dimension of the test element and to simultaneously weld the layers at the edges thereof, said energy softening and fusing the fusible layer to thereby bond the layers together.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.