Patent US4018919A successfully refreshed from Google Patents.
US4018919A
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Sequential contraceptive method using two types of progestational agents
Assignee: Eli Lilly and Co
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Filing: 1975-07-16
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Granted: 1977-04-19
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Expires: 1995-07-16
Abstract
Abstract Sequential administration of specified progestational agents to a female mammal during the follicular and luteal phases of the sexual cycle provides a novel and effective method of contraception.
Inventors
- 👤 Larry J. Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:30
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A method of contraception for female mammals which comprises the administration to a female mammal of a Type B progestin during the follicular phase of the sexual cycle and a Type A progestin during the luteal phase of the sexual cycle, at dose levels sufficient to prevent conception.
Claim 2
Independent Claim
48 words
A method of contraception for female mammals which comprises the administration to a female mammal of a Type B progestin during the follicular phase of the sexual cycle and a Type A progestin during the luteal phase of the sexual cycle, at dose levels sufficient to prevent conception.
Claim 3
Dependent Claim
22 words
The method according to claim 1 in which the Type B progestin is chlormadinone acetate and the Type A progestin is norethindrone.
Claim 4
Dependent Claim
63 words
The method according to claim 1 in which the Type B progestin is administered at a rate equivalent to administration of 0.166 to 8.33 mcg. of chlormadinone per kg. of female body weight per day and the Type A progestin is administered at a rate equivalent to administration of 0.0017 to 0.0833 mg. of norethindrone per kg. of female body weight per day.
Claim 5
Independent Claim
58 words
A method of contraception for human females which comprises oral administration to a human female of a Type B progestin during the follicular phase of the menstrual cycle -- from about day 6 through day 16 -- and a Type A progestin during the luteal phase of the menstrual cycle -- from about day 17 through day 28.
Claim 6
Independent Claim
58 words
A method of contraception for human females which comprises oral administration to a human female of a Type B progestin during the follicular phase of the menstrual cycle -- from about day 6 through day 16 -- and a Type A progestin during the luteal phase of the menstrual cycle -- from about day 17 through day 28.
Claim 7
Dependent Claim
21 words
The method according to claim 4 in which chlormadinone is the Type B progestin and norethindrone is the Type A progestin.
Claim 8
Dependent Claim
50 words
The method according to claim 4 in which the daily dosage level of the Type B progestin in the follicular phase is equivalent to of 10-50 mcg. of chlormadinone and the daily dosage level of the Type A progestin in the luteal phase is equivalent to 0.1-5 mg. of norethindrone.
Claim 9
Dependent Claim
51 words
A contraceptive process which comprises oral administration to a human female of from 10-500 mcg. of chlormadinone daily during the follicular phase of the menstrual cycle -- day 6 day 16 -- followed by administration of 0.1 - 5 mg. of norethindrone daily during the luteal phase of the menstrual cycle.
Claim 10
Dependent Claim
51 words
A contraceptive process which comprises oral administration to a human female of from 10-500 mcg. of chlormadinone daily during the follicular phase of the menstrual cycle -- day 6 day 16 -- followed by administration of 0.1 - 5 mg. of norethindrone daily during the luteal phase of the menstrual cycle.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |