Disposable contraceptive cervical barrier

Details Disposable contraceptive cervical barrier Disposable contraceptive cervical barrier

1978-07-17

1980-04-22

Michell, Robert W.

Surgery

Truss

Pad

A61J 546

Patent

active

041989651

ABSTRACT:
Disposable contraceptive intravaginal cervical barriers of one, two, three, four, or five layers in the form of standard pessaries with at least one layer impervious to the passage of sperm, with a medicament such as spermicide, germicide, or an abortion inducing agent either impregnated into a foam plastic layer or in the form of a layer of gel or powder, said medicament being activatable upon contact with an aqueous solution.
Methods of producing disposable contraceptive barriers either as a wet foam plastic method wherein medicament is added to liquid foam and the resulting mixture is formed in a mold with any subsequent layers then added, or as a dry foam plastic method wherein layers including a layer of medicament in the form of a gel or a powder are superposed in sequence and formed in a die.

REFERENCES:
patent: 2551618 (1951-05-01), Mayer
patent: 2580133 (1951-12-01), Sheen
patent: 3157178 (1964-11-01), Bentov
patent: 3404682 (1968-10-01), Waldron
patent: 3463745 (1969-08-01), Hofrichter et al.
patent: 3780730 (1973-12-01), Weisman

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