US4058124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable absorbent articles containing particulate, free-flowing, insoluble swellable polymers
Assignee: Union Carbide Corp
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Filing: 1975-03-28
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Granted: 1977-11-15
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Expires: 1995-03-28
Abstract
Abstract Particulate, free-flowing, insoluble swellable polymers are provided which are comprised of a mixture of an insoluble, swellable hydrogel and inert filler. The mixtures are free-flowing powders or granules which can absorb many times their weight of water and hence are useful as a soil amendment.
Inventors
- 👤 Steven N. Yen
- 👤 Frederick D. Osterholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:55
CPC Classifications
C; C08; C08L; C08L101/00; A; A01; A01G; A01G24/00; A01G24/20; A01G24/22; A01G24/23; A01G24/30; A01G24/35; A01G24/40; A01G24/42; A01N; A01N25/00; A01N25/08; A01N25/10; A61; A61L; A61L15/00; A61L15/16; A61L15/18; A61L15/20; A61L15/40; A61L15/42; A61L15/60; C05; C05D; C05D9/00; C05G; C05G5/00; C05G5/30; C05G5/37; C05G5/40; C08J; C08J3/00; C08J3/12; C08J3/124; C08J3/20; C08J3/205; C08J3/28; C09; C09K; C09K17/00; C09K17/14; C09K17/16; C09K17/18; C09K17/20; C09K17/22; C09K17/40; C08J2300/00; C08J2300/10; C08J2300/14; Y; Y10; Y10S; Y10S47/00; Y10S47/10; Y10S604/00; Y10S604/904; Y10S71/00; Y10S71/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A disposable absorbent article containing a mixture prepared by: a. blending at least one water soluble pulverulent hydrophilic polymer and at least one pulverulent inert filler in a ratio of polymer to filler of from about 1:9 to about 9:1, a substantial portion of said filler having a particle size less than that of said polymer and present in an amount sufficient to cover a substantial portion of the surface area of said pulverulent polymer. b. thereafter while said blending is continued, contacting said mixture under thorough agitation with a finely divided spray of water at a rate and in an amount not to exceed that at which the mixture is maintained in a free-flowing particulate form, and c. thereafter exposing said mixture in said free-flowing particulate form to ionizing radiation for a period of time to crosslink said polymer.
Claim 2
Dependent Claim
140 words
A disposable absorbent article containing a mixture prepared by: a. blending at least one water soluble pulverulent hydrophilic polymer and at least one pulverulent inert filler in a ratio of polymer to filler of from about 1:9 to about 9:1, a substantial portion of said filler having a particle size less than that of said polymer and present in an amount sufficient to cover a substantial portion of the surface area of said pulverulent polymer. b. thereafter while said blending is continued, contacting said mixture under thorough agitation with a finely divided spray of water at a rate and in an amount not to exceed that at which the mixture is maintained in a free-flowing particulate form, and c. thereafter exposing said mixture in said free-flowing particulate form to ionizing radiation for a period of time to crosslink said polymer.
Claim 3
Dependent Claim
12 words
The disposable absorbent article of claim 1 which is a catamenial device.
Claim 4
Dependent Claim
12 words
The disposable absorbent article of claim 1 which is a sanitary napkin.
Claim 5
Dependent Claim
11 words
The disposable absorbent article of claim 1 which is a tampon.
Claim 6
Dependent Claim
11 words
The disposable absorbent article of claim 1 which is a diaper.
References Cited (Backward Citations)
US3121674A
Cited
US3264202A
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US3336129A
Cited
US3470078A
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US3316676A
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US3900378A
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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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |