Patent US4387094A successfully refreshed from Google Patents.
US4387094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contraceptive method and composition containing tannic acid
Assignee: Laboratories Human-Pharmaceuticals SA
•
Filing: 1981-02-18
•
Granted: 1983-06-07
•
Expires: 2001-02-18
Abstract
Abstract The present invention relates to a novel local contraceptive method according to which the passage of spermatozoa in the cervical canal is prevented, the said method being characterized in that the physico-chemical structure of the cervical mucus is modified by means of at least one coagulating agent. It also concerns compositions for putting this novel method into effect, particularly compositions comprising at least one coagulating agent such as tannic acid. These compositions may also contain an agent which assists and completes the action of the coagulating agent.
Inventors
- 👤 Michel Bagros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:49
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; Y; Y10; Y10S; Y10S424/00; Y10S424/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A contraceptive method which essentially comprises administering vaginally prior to sexual intercourse an amount of a composition comprising as essential constituents tannic acid and as an adjuvant carboxymethylcysteine in amounts effective to prevent the passage of spermatozoa along the cervical canal to the uterine cavity by coagulation of the cervical mucus for rendering the mucus impassable to spermatozoa, said composition comprising on the basis of weight: about 30 parts to about 80 parts tannic acid; and about 0.5 parts to about 10 parts carboxymethylcysteine.
Claim 2
Dependent Claim
84 words
A contraceptive method which essentially comprises administering vaginally prior to sexual intercourse an amount of a composition comprising as essential constituents tannic acid and as an adjuvant carboxymethylcysteine in amounts effective to prevent the passage of spermatozoa along the cervical canal to the uterine cavity by coagulation of the cervical mucus for rendering the mucus impassable to spermatozoa, said composition comprising on the basis of weight: about 30 parts to about 80 parts tannic acid; and about 0.5 parts to about 10 parts carboxymethylcysteine.
Claim 3
Dependent Claim
81 words
A contraceptive composition for vaginal administration prior to sexual intercourse and comprising a physiologically acceptable carrier and a cervical mucus coagulant essentially comprising tannic acid and as an adjuvant carboxymethylcysteine present in amounts effective in use to prevent passage of spermatozoa along the cervical canal to the uterine cavity by rendering the mucus impassable to spermatozoa, said comprising on the basis of weight: about 30 parts to about 80 parts tannic acid; and about 0.5 parts to about 10 parts carboxymethylcysteine.
Claim 4
Dependent Claim
81 words
A contraceptive composition for vaginal administration prior to sexual intercourse and comprising a physiologically acceptable carrier and a cervical mucus coagulant essentially comprising tannic acid and as an adjuvant carboxymethylcysteine present in amounts effective in use to prevent passage of spermatozoa along the cervical canal to the uterine cavity by rendering the mucus impassable to spermatozoa, said comprising on the basis of weight: about 30 parts to about 80 parts tannic acid; and about 0.5 parts to about 10 parts carboxymethylcysteine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |