Patent US3994298A successfully refreshed from Google Patents.
US3994298A
Expired / Lapsed
US
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Foam aggregate catamenial tampon
Assignee: Procter and Gamble Co
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Filing: 1975-11-26
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Granted: 1976-11-30
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Expires: 1995-11-26
Abstract
Abstract Foams (as for example polyurethane foam) catamenial tampons which have been treated with surfactant. Catamenial tampons of this invention exhibit improved humid expansion characteristics. In a preferred embodiment, the catamenial tampons comprise particles of lubricated polyurethane foam which have been treated with surfactant and which are contained within a fluid permeable overwrap. The invention includes a process for making the above described catamenial tampons.
Inventors
- 👤 Thomas A. Des Marais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/2022; A61F13/2037; A61F13/2082; A61F13/2085; Y; Y10; Y10S; Y10S521/00; Y10S521/918; Y10S604/00; Y10S604/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
A catamenial tampon with improved humid expansion characteristics comprising a resilient, absorbent, particulate lubricated foam material treated with non-ionic surfactant.
Claim 2
Dependent Claim
20 words
A catamenial tampon with improved humid expansion characteristics comprising a resilient, absorbent, particulate lubricated foam material treated with non-ionic surfactant.
Claim 3
Dependent Claim
25 words
The catamenial tampon of claim 1 wherein said surfactant is present at from about 0.1 to about 15 percent by weight of said foam material.
Claim 4
Dependent Claim
25 words
The catamenial tampon of claim 1, wherein said surfactant is present at from about 0.1 to about 5 percent by weight of said foam material.
Claim 5
Dependent Claim
31 words
A catamenial tampon with improved humid expansion characteristics comprising resilient, absorbent, lubricated foam material in particulate form contained within a permeable overwrap, said foam material having been treated with non-ionic surfactant.
Claim 6
Dependent Claim
31 words
A catamenial tampon with improved humid expansion characteristics comprising resilient, absorbent, lubricated foam material in particulate form contained within a permeable overwrap, said foam material having been treated with non-ionic surfactant.
Claim 7
Dependent Claim
12 words
The catamenial tampon of claim 4, wherein said foam material is polyurethane.
Claim 8
Dependent Claim
19 words
The catamenial tampon of claim 5, wherein said surfactant is present at from about 0.1 to about 15 percent.
Claim 9
Dependent Claim
25 words
The catamenial tampon of claim 5, wherein said surfactant is present at from about 0.1 to about 5 percent by weight of said foam material.
Claim 10
Dependent Claim
25 words
The catamenial tampon of claim 4, wherein said surfactant is present at from about 0.1 to about 15 percent by weight of said foam material.
Claim 11
Dependent Claim
25 words
The catamenial tampon of claim 4, wherein said surfactant is present at from about 0.1 to about 5 percent by weight of said foam material.
References Cited (Backward Citations)
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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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |