  A search for stable and long-lived massive particles of electric charge
|Q/e|=1 or fractional charges of 2/3, 4/3, and 5/3 is reported using data
collected by the OPAL detector at LEP, at centre-of-mass energies from 130 to
209 GeV. These particles are assumed to be pair-produced in e+e- collisions and
not to interact strongly. No evidence for the production of these particles was
observed. Model-independent upper limits on the production cross-section
between 0.005 and 0.028 pb have been derived for scalar and spin-1/2 particles
with charge +-1. Within the framework of the Constrained Minimal Supersymmetric
Standard Model (CMSSM), this implies a lower limit of 98.0 (98.5) GeV on the
mass of long-lived right (left)- handed scalar muons and scalar taus.
Long-lived charged heavy leptons and charginos are excluded for masses below
102.0 GeV. For particles with fractional charge +-2/3, +-4/3, and +-5/3, the
upper limit on the production cross-section varies between 0.005 and 0.020 pb.
All mass and cross-section limits are derived at the 95% confidence level and
are valid for particles with lifetimes longer than 10-6s.
