US3876757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contraception agent
Assignee: Merz and Co GmbH and Co KG
•
Filing: 1973-03-16
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Granted: 1975-04-08
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Expires: 1993-03-16
Abstract
Abstract A spermicidally-active suppository having advantageous properties comprising spermicide, a water-soluble polyethylene glycol suppository base, foaming agent, and foam-stabilizing agent, having a relatively low percentage by weight of foam-developing agent, wherein the spermicide is an alkylphenoxypolyethoxyethanol, the suppository base comprising about 65 to 85 percent by weight of a water-soluble polyethylene glycol which is meltable at body temperature, and the foaming agent comprising about 10 to 20 percent by weight of a mixture of tartaric acid and sodium bicarbonate, and a method of producing the same, are disclosed.
Inventors
- 👤 Arthur Scherm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0002; A61K9/0007; A61K9/0012; A61K9/0034; A61K9/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
IN A SPERMICIDALLY ACTIVITY VAGINAL SUPPOSITORY CONSISTING ESSENTIALLY OF SPERMICIDE, A SUPPOSITORY BASE COMPRISING A WATER-SOLUBLE POLYETHLENE GLYCOL, FOAMING AGENT, AND FOAMSTABILIZING AGENT, WHEREIN THE SPERMICIDE IS AN ALKYLPHENOXYPOLYETHANOL, THE IMPROVEMENT WHICH COMPRISES (1) THE EMPLOYMENT OF ABOUT 65 TO 85 PERCENT BY WEIGHT OF A WATER-SOLUBLE POLYETHYLENE GLYCOL WHICH IS MELTABLE AT BODY TEMPERATURE AS THE SUPPOSITY BASE ANS (2) ABOUT 10 TO 20 PERCENT BY WEIGHT OF A MIXTURE OF TARTATIC ACID AND SODIUM BICARBONATE AS THE FOAMING AGENT.
Claim 2
Dependent Claim
81 words
IN A SPERMICIDALLY ACTIVITY VAGINAL SUPPOSITORY CONSISTING ESSENTIALLY OF SPERMICIDE, A SUPPOSITORY BASE COMPRISING A WATER-SOLUBLE POLYETHLENE GLYCOL, FOAMING AGENT, AND FOAMSTABILIZING AGENT, WHEREIN THE SPERMICIDE IS AN ALKYLPHENOXYPOLYETHANOL, THE IMPROVEMENT WHICH COMPRISES (1) THE EMPLOYMENT OF ABOUT 65 TO 85 PERCENT BY WEIGHT OF A WATER-SOLUBLE POLYETHYLENE GLYCOL WHICH IS MELTABLE AT BODY TEMPERATURE AS THE SUPPOSITY BASE ANS (2) ABOUT 10 TO 20 PERCENT BY WEIGHT OF A MIXTURE OF TARTATIC ACID AND SODIUM BICARBONATE AS THE FOAMING AGENT.
Claim 3
Dependent Claim
64 words
A spermicidally active vaginal suppository according to claim 1 consisting essentially of about 2 to 5 percent by weight of p-nonylphenoxypolyethoxyethanol, about 65 to 85 percent by weight of water-soluble polyethylene glycol meltable at body temperature, about 10 to 20 percent by weight of a mixture of tartaric acid and sodium bicarbonate, and about 2 to 4 percent by weight of sodium lauryl sulfate.
Claim 4
Dependent Claim
76 words
A spermidically active vaginal suppository according to claim 2 consisting essentially of 2 to 5 percent by weight of p-nonylphenoxypolyethoxyethanol, 65 to 85 percent by weight of a mixture of polyethylene glycol of a molecular weight of about 1350 and polyethylene glycol of a molecular weight of about 1000, 10 to 20 percent by weight of a mixture of tartaric acid and sodium hydrogen carbonate, and 2 to 4 percent by weight of sodium lauryl sulfate.
Claim 5
Dependent Claim
88 words
A spermicidally active suppository according to claim 2 having an egg-shaped form and a weight of between 2 to 5 grams and consisting essentially of 2 to 5 percent by weight of p-nonylphenoxypolyethoxyethanol, 65 to 85 percent by weight of a mixture of polyethylene glycol of a molecular weight of about 1350 and polyethylene glycol of a molecular weight of about 1000, 10 to 20 percent by weight of a mixture of tartaric acid and sodium bicarbonate, and 2 to 4 percent by weight of sodium lauryl sulfate.
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |