Abstract: A thermoset material obtained from a curing by heat treatment of a resin that can be obtained by polycondensation, in basic medium, of at least one phthalonitrile compound bearing on its benzene ring at least one hydroxyl group.

Abstract: A device (10) is provided for electrically recharging the internal battery of a cellular telephone (20). The device (10) has a casing (11) containing power and current-transforming electronic components, a unit (13) for connecting to an external current source, of mains type, and a unit (14) for connecting to said cellular telephone. The device also includes a backup battery incorporated in the casing intended, on the one hand, to recharge the battery of the cellular telephone (20) when the device (10) is linked only to the latter and, on the other hand, to be recharged when the device (10) is linked at least to the external current source.

Abstract: The wireless earpiece comprises two bodies (1, 2) articulated one about the other, one of which bears a speaker for fitting into the ear of the user. The other body (2) wraps around the outer part of this ear to hold the earpiece in the use position. A metal return spring (7) is wound around the hinge pin (5) of the two bodies (1, 2) to return the latter toward one another, when at rest, while clamping the user's ear which allows the earpiece to be held in position. The earpiece allows quick fitting and effective hold in this position.