US3589364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bibulous cellulosic fibers
Assignee: Georgia Pacific Nonwovens LLC
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Filing: 1968-09-13
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Granted: 1971-06-29
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Expires: 1988-09-13
Abstract
Abstract Bibulous cellulosic fibers for use in fibrous structures having an inherently absorptive function, for example surgical dressings, surgical sponges filters, catamenial napkins, tampons and diapers, which bibulous cellulosic fibers, and fibrous structures containing said bibulous fibers in effective amounts, are characterized by greatly improved absorbency for and retention of aqueous solutions, including physiological solutions. The bibulous cellulosic fibers are substantially water-insoluble, wet cross-linked fibrous salts of carboxymethyl cellulose having a sufficiently high degree of carboxymethyl substitution to insure water solubility in the absence of crosslinking. The bibulous cellulosic fibers are produced under conditions which preserve the fibrous form of the cellulose fiber raw material.
Inventors
- 👤 Walter Lee Dean
- 👤 George Nathan Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/05; D06M15/07; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/10; C08B11/12; C08B15/00; C08B15/10; D06M13/00; D06M13/10; D06M13/11; D06M13/184; D06M13/207; D06M13/21; Y; Y10; Y10S; Y10S604/00; Y10S604/904
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
Substantially water-insoluble, wet cross-linked carboxymethyl cellulose fibers, having a WRV of about 900 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption and retention of aqueous solutions, which substantially water-insoluble, wet cross-linked fibers of carboxymethyl cellulose have a degree of substitution of about 0.4 to about 1.6.
Claim 2
Dependent Claim
65 words
Substantially water-insoluble, wet cross-linked carboxymethyl cellulose fibers, having a WRV of about 900 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption and retention of aqueous solutions, which substantially water-insoluble, wet cross-linked fibers of carboxymethyl cellulose have a degree of substitution of about 0.4 to about 1.6.
Claim 3
Dependent Claim
65 words
Substantially water-insoluble, epichlorohydrin wet cross-linked carboxymethyl cellulose fibers, having a WRV of about 900 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption of aqueous solutions, which substantially water-insoluble, epichlorohydrin wet cross-linked fibers of carboxymethyl cellulose have a degree of substitution of about 0.4 to about 1.6.
Claim 4
Dependent Claim
65 words
Substantially water-insoluble, epichlorohydrin wet cross-linked carboxymethyl cellulose fibers, having a WRV of about 900 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption of aqueous solutions, which substantially water-insoluble, epichlorohydrin wet cross-linked fibers of carboxymethyl cellulose have a degree of substitution of about 0.4 to about 1.6.
Claim 5
Dependent Claim
22 words
An absorbent fibrous structure, comprising a preformed absorbent pad, containing in effective amount the substantially water-insoluble carboxymethyl cellulose fibers of claim 2.
Claim 6
Dependent Claim
12 words
The absorbent fibrous structure of claim 3 which is a surgical dressing.
Claim 7
Dependent Claim
12 words
The absorbent fibrous structure of claim 3 which is a catamenial napkin.
Claim 8
Dependent Claim
11 words
The absorbent fibrous structure of claim 3 which is a diaper.
Claim 9
Dependent Claim
11 words
The absorbent fibrous structure of claim 3 which is a tampon.
Claim 10
Dependent Claim
29 words
The absorbent fibrous structure of claim 3 which is a filter for removing undissolved water from substantially immiscible aqueous systems comprised of water together with at least one hydrocarbon.
Claim 11
Dependent Claim
65 words
Substantially water-insoluble, wet cross-linked sodium carboxymethyl cellulose fibers, having a WRV of about 1,100 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption of physiological solutions, which substantially water-insoluble, wet cross-linked fibers of sodium carboxymethyl cellulose have a degree of substitution of about 0.6 to about 1.2.
Claim 12
Dependent Claim
65 words
Substantially water-insoluble, wet cross-linked sodium carboxymethyl cellulose fibers, having a WRV of about 1,100 to about 3,400 and a SRV of about 400 to about 1,500 and manifesting their native cellulosic fiber structure, for use in fibrous structures for the absorption of physiological solutions, which substantially water-insoluble, wet cross-linked fibers of sodium carboxymethyl cellulose have a degree of substitution of about 0.6 to about 1.2.
Claim 13
Dependent Claim
27 words
A tampon, comprising a preformed fibrous body compressed in cylindrical form, containing in effective amount the substantially water-insoluble, wet cross-linked sodium carboxymethyl cellulose fibers of claim 9.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |