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US4198965A
Expired / Lapsed
US
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Disposable contraceptive cervical barrier
Assignee: STRICKMAN MELVIN B
•
Filing: 1978-07-17
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Granted: 1980-04-22
•
Expires: 1998-07-17
Abstract
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.
Inventors
- 👤 Robert L. Strickman
- 👤 Erick-Pierre Fournier
- 👤 Melvyn B. Strickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0036; A61F; A61F6/00; A61F6/06; A61F6/08
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
69 words
A disposable contraceptive intravaginal cervical barrier, which comprises a substantially circular, flexible member, said member being formed of a foam plastic material and having one surface of said member cured during manufacture so that said surface is impermeable to the passage of sperm, and a medicament that is pre-impregnated within said foam plastic material during manufacture of the barrier and that is activatable upon contact with an aqueous substance.
Claim 2
Dependent Claim
69 words
A disposable contraceptive intravaginal cervical barrier, which comprises a substantially circular, flexible member, said member being formed of a foam plastic material and having one surface of said member cured during manufacture so that said surface is impermeable to the passage of sperm, and a medicament that is pre-impregnated within said foam plastic material during manufacture of the barrier and that is activatable upon contact with an aqueous substance.
Claim 3
Dependent Claim
13 words
The contraceptive barrier of claim 1, wherein said foam plastic material is polyurethane.
Claim 4
Dependent Claim
17 words
The contraceptive barrier of claim 1, wherein said medicament is spermicide, germicide, or an abortion inducing agent.
Claim 5
Dependent Claim
26 words
The contraceptive barrier of claim 1, including a rim portion unitary with said flexible member cooperating to define a means for achieving a spring tension effect.
Claim 6
Dependent Claim
16 words
The contraceptive barrier of claim 4, wherein said rim portion is cured to a resilient quality.
Claim 7
Dependent Claim
23 words
The contraceptive barrier of claim 4, wherein said means for achieving a spring tension effect is a resilient ring embedded within said member.
Claim 8
Dependent Claim
53 words
The contraceptive barrier of claim 4, wherein said means for achieving a spring tension effect has means for allowing said plastic material on one side of said means for achieving a spring tension effect to bind with said plastic material on the opposite side of said means for achieving a spring tension effect.
Claim 9
Dependent Claim
26 words
The contraceptive barrier of claim 1, wherein said medicament is time encapsulated for a preset time release period and activatable upon contact with an aqueous substance.
Claim 10
Dependent Claim
21 words
The contraceptive barrier of claim 1, wherein said member includes means for holding said member over the cervix by tension means.
Claim 11
Dependent Claim
26 words
The contraceptive barrier of claim 1, wherein said member includes means for holding said member over the cervix by both tension means and by suction means.
Claim 12
Dependent Claim
21 words
The contraceptive barrier of claim 1, wherein said member includes means for holding said member over the cervix by suction means.
Claim 13
Dependent Claim
24 words
The contraceptive barrier of claim 11, wherein said member is provided with protruding means for blocking the passage of said sperm into the cervix.
Claim 14
Dependent Claim
33 words
The contraceptive barrier of claim 1, wherein the rim of said member is provided with gripping means formed on said rim to hold said member more firmly to the walls of the vagina.
Claim 15
Dependent Claim
63 words
A disposable contraceptive intravaginal cervical barrier, which comprises a substantially circular flexible member, said member being formed of a foam plastic material, a medicament being pre-impregnated within said foam plastic material during manufacture of the barrier and being activatable upon contact with an aqueous substance, and a resilient film impermeable to the passage of sperm and adhering to one side of said member.
Claim 16
Dependent Claim
63 words
A disposable contraceptive intravaginal cervical barrier, which comprises a substantially circular flexible member, said member being formed of a foam plastic material, a medicament being pre-impregnated within said foam plastic material during manufacture of the barrier and being activatable upon contact with an aqueous substance, and a resilient film impermeable to the passage of sperm and adhering to one side of said member.
Claim 17
Dependent Claim
13 words
The contraceptive barrier of claim 14, wherein said foam plastic material is polyurethane.
Claim 18
Dependent Claim
18 words
The contraceptive barrier of claim 14, wherein said film adheres to the concave, external side of said member.
Claim 19
Dependent Claim
18 words
The contraceptive barrier of claim 14, wherein said film adheres to the convex, internal side of said member.
Claim 20
Dependent Claim
17 words
The contraceptive barrier of claim 14, wherein the film is made of plastic, natural rubber, or latex.
Claim 21
Dependent Claim
17 words
The contraceptive barrier of claim 14, wherein said medicament is spermicide, germicide, or an abortion inducing agent.
Claim 22
Dependent Claim
26 words
The contraceptive barrier of claim 14, including a rim portion unitary with said flexible member cooperating to define a means for achieving a spring tension effect.
Claim 23
Dependent Claim
22 words
The contraceptive barrier of claim 20, wherein said means for achieving a spring tension effect is a ring embedded within said member.
Claim 24
Dependent Claim
53 words
The contraceptive barrier of claim 20, wherein said means for achieving a spring tension effect has means for allowing said plastic material on one side of said means for achieving a spring tension effect to bind with said plastic material on the opposite side of said means for achieving a spring tension effect.
Claim 25
Dependent Claim
26 words
The contraceptive barrier of claim 14, wherein said medicament is time encapsulated for a preset time release period and activatable upon contact with an aqueous substance.
Claim 26
Dependent Claim
21 words
The contraceptive barrier of claim 14, wherein said member includes means for holding said member over the cervix by tension means.
Claim 27
Dependent Claim
26 words
The contraceptive barrier of claim 14, wherein said member includes means for holding said member over the cervix by both tension means and by suction means.
Claim 28
Dependent Claim
21 words
The contraceptive barrier of claim 14, wherein said member includes means for holding said member over the cervix by suction means.
Claim 29
Dependent Claim
23 words
The contraceptive barrier of claim 26, wherein said member is provided with protruding means for blocking the passage of sperm into the cervix.
Claim 30
Dependent Claim
43 words
The contraceptive barrier of claim 14, further comprising a layer of plastic foam intimately adhering to said film, wherein said film is intimately positioned between said member and said layer of plastic foam, said layer of plastic foam being impregnated with said medicament.
Claim 31
Dependent Claim
25 words
The contraceptive barrier of claim 14, wherein said layer of plastic foam is polyurethane and said medicament is spermicide, germicide, or an abortion inducing agent.
Claim 32
Dependent Claim
70 words
A disposable contraceptive intravaginal cervical barrier, which comprises a first substantially circular flexible member, said member being formed of a foam plastic material and being permeable to the passage of water, a second substantially circular flexible member, said member being impermeable to the passage of sperm, and a layer of medicament intimately formed between said first and said second members, said medicament being activatable upon contact with an aqueous substance.
Claim 33
Dependent Claim
70 words
A disposable contraceptive intravaginal cervical barrier, which comprises a first substantially circular flexible member, said member being formed of a foam plastic material and being permeable to the passage of water, a second substantially circular flexible member, said member being impermeable to the passage of sperm, and a layer of medicament intimately formed between said first and said second members, said medicament being activatable upon contact with an aqueous substance.
Claim 34
Dependent Claim
25 words
The contraceptive barrier of claim 30, wherein said second member is made of foam plastic material having one surface impermeable to the passage of sperm.
Claim 35
Dependent Claim
13 words
The contraceptive barrier of claim 31, wherein said foam plastic material is polyurethane.
Claim 36
Dependent Claim
20 words
The contraceptive barrier of claim 30, wherein said second member is a resilient film impermeable to the passage of sperm.
Claim 37
Dependent Claim
29 words
The contraceptive barrier of claim 33, further comprising a substantially circular outer member made of foam plastic material that intimately adheres to the outer surface of said resilient film.
Claim 38
Dependent Claim
17 words
The contraceptive barrier of claim 34, wherein said foam plastic material of said outer member is polyurethane.
Claim 39
Dependent Claim
13 words
The contraceptive barrier of claim 30, wherein said foam plastic material is polyurethane.
Claim 40
Dependent Claim
17 words
The contraceptive barrier of claim 30, wherein said medicament is spermicide, germicide, or an abortion inducing agent.
Claim 41
Dependent Claim
15 words
The contraceptive barrier of claim 30, wherein said medicament is in the form of gel.
Claim 42
Dependent Claim
16 words
The contraceptive barrier of claim 30, wherein said medicament is in the form of a powder.
Claim 43
Dependent Claim
26 words
The contraceptive barrier of claim 30, wherein said medicament is time encapsulated for a preset time release period and activatable upon contact with an aqueous solution.
Claim 44
Dependent Claim
36 words
The contraceptive barrier of claim 30, further comprising a third substantially flexible member made of resilient film permeable to the passage of water and intimately formed between said first flexible member and said layer of medicament.
Claim 45
Dependent Claim
29 words
The contraceptive barrier of claim 41, further comprising a substantially circular fourth member made of foam plastic material that intimately adheres to the outer surface of said resilient film.
Claim 46
Dependent Claim
17 words
The contraceptive barrier of claim 42, wherein said foam plastic material of said fourth member is polyurethane.
Claim 47
Dependent Claim
23 words
The contraceptive barrier of claim 30, wherein a means for achieving a spring tension effect is unitary with the rim of said member.
Claim 48
Dependent Claim
29 words
The contraceptive barrier of claim 44, wherein said means for achieving a spring tension effect is a resilient ring embedded within said rim between said first and second members.
Claim 49
Dependent Claim
48 words
The contraceptive barrier of claim 44, wherein said means for achieving a spring tension effect has means for allowing said first member on one side of said resilient means to bind with said second member on the opposite side of said means for achieving a spring tension effect.
Claim 50
Dependent Claim
21 words
The contraceptive barrier of claim 30, wherein said barrier includes means for holding said member over the cervix by tension means.
Claim 51
Dependent Claim
26 words
The contraceptive barrier of claim 30, wherein said barrier includes means for holding said member over the cervix by both tension means and by suction means.
Claim 52
Dependent Claim
21 words
The contraceptive barrier of claim 30, wherein said barrier includes means for holding said member over the cervix by suction means.
Claim 53
Dependent Claim
24 words
The contraceptive barrier of claim 30, wherein said barrier is provided with protruding means for blocking the passage of said sperm into the cervix.
Claim 54
Dependent Claim
30 words
The contraceptive barrier of claim 30, wherein said barrier is provided with gripping means formed on said rim to hold said barrier more firmly to the walls of the vagina.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |