Patent US2293303A successfully refreshed from Google Patents.
US4187286A
Expired / Lapsed
US
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Contraceptive suppository
Assignee: G and W Laboratories Inc
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Filing: 1979-01-02
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Granted: 1980-02-05
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Expires: 1999-01-02
Abstract
Abstract A suppository especially adapted for vaginal insertion to act as a contraceptive which comprises a mixture of polyethylene glycol, a spermicidally-active ingredient, a thickening agent, an effervescent agent and alginic acid, the action of the alginic acid reacting with the effervescent agent in moist conditions to form carbon dioxide and also forming a viscous barrier adherent to the vaginal walls to prevent penetration of the sperm.
Inventors
- 👤 Bertram J. Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:49
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; Y; Y10; Y10S; Y10S424/00; Y10S424/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A suppository consisting essentially of polyethylene glycol, a thickening agent, alginic acid, an effervescent agent and a medicinally active ingredient, the polyethylene glycol being present in a proportion of about 61.2-74.8 percent by weight, the thickening agent being present in a proportion of about 0.9-1.1 percent by weight, the effervescent agent being present in a proportion of about 10.8-13.2 percent by weight, the alginic acid being present in a proportion of about 13.5-16.5 percent by weight, and the medicinally active ingredients being present in a proportion of about 3.6-4.4 percent by weight.
Claim 2
Dependent Claim
92 words
A suppository consisting essentially of polyethylene glycol, a thickening agent, alginic acid, an effervescent agent and a medicinally active ingredient, the polyethylene glycol being present in a proportion of about 61.2-74.8 percent by weight, the thickening agent being present in a proportion of about 0.9-1.1 percent by weight, the effervescent agent being present in a proportion of about 10.8-13.2 percent by weight, the alginic acid being present in a proportion of about 13.5-16.5 percent by weight, and the medicinally active ingredients being present in a proportion of about 3.6-4.4 percent by weight.
Claim 3
Dependent Claim
41 words
The suppository of claim 1 wherein the polyethylene glycol is a mixture of at least two different molecular weight polyethylene glycols, one having a molecular weight of about 300 and at least one other having a molecular weight of about 1000.
Claim 4
Dependent Claim
30 words
The suppository of claim 1 wherein the thickening agent is a member of the group consisting of microcrystalline cellulose, methyl cellulose, carboxymethyl cellulose, polyvinyl pyrrolidone, sodium alginate, and mixtures thereof.
Claim 5
Dependent Claim
22 words
The suppository of claim 1 wherein the effervescent agent is a member of the group consisting of sodium bicarbonate and potassium biphosphate.
Claim 6
Dependent Claim
13 words
The suppository of claim 1 wherein the medicinally active agent is a spermicide.
Claim 7
Dependent Claim
10 words
The suppository of claim 5 wherein the spermicide is nonoxynol-9.
Claim 8
Dependent Claim
10 words
The suppository of claim 1 wherein the suppository is vaginally-insertable.
Claim 9
Dependent Claim
10 words
The suppository of claim 1 wherein the suppository is rectally-insertable.
Claim 10
Dependent Claim
21 words
The suppository of claim 8 wherein the medicinally-acitve ingredients are selected from the group consisting of bisacodyl, aminophylline, acetaminophen and aspirin.
Claim 11
Dependent Claim
26 words
The suppository of claim 1 wherein the alginic acid and the effervescent agent together comprise about 24.3 to about 29.7 percent by weight of the composition.
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |