Patent US4458042A successfully refreshed from Google Patents.
US4458042A
Expired / Lapsed
US
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Absorbent material
Assignee: Hercules LLC
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Filing: 1983-03-21
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Granted: 1984-07-03
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Expires: 2003-03-21
Abstract
Abstract Disclosed is absorbent material composed of a consolidated blend of spurted polyolefin pulp, treated with an anionic or nonionic wetting agent substance having a molecular weight less than about 8000, and wood fluff pulp. The absorbent material exhibits a desirable combination of strength, rate of absorbency and total absorbency.
Inventors
- 👤 Herbert H. Espy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:36
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D21H5/202; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61L15/48; C; C08; C08L; C08L97/00; C08L97/02; D21H13/00; D21H13/10; D21H13/12; D21H13/14; C08L23/00; C08L23/02; C08L23/04; C08L23/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
An absorbent material comprising a consolidated blend consisting essentially of wood fluff pulp and from about 3 to about 30%, based on the total weight of the consolidated blend, spurted polyolefin pulp, where the spurted polyolefin pulp is treated from about 0.05 to about 3%, based on the weight of the spurted polyolefin pulp, of a nonionic or an ionic wetting agent substance having a molecular weight less than about 8000.
Claim 2
Dependent Claim
71 words
An absorbent material comprising a consolidated blend consisting essentially of wood fluff pulp and from about 3 to about 30%, based on the total weight of the consolidated blend, spurted polyolefin pulp, where the spurted polyolefin pulp is treated from about 0.05 to about 3%, based on the weight of the spurted polyolefin pulp, of a nonionic or an ionic wetting agent substance having a molecular weight less than about 8000.
Claim 3
Dependent Claim
15 words
The consolidated blend of claim 1 wherein the spurted polyolefin pulp is spurted polyethylene pulp.
Claim 4
Dependent Claim
15 words
The consolidated blend of claim 1 wherein the spurted polyolefin pulp is spurted polypropylene pulp.
Claim 5
Dependent Claim
38 words
The consolidated pulp of claim 1 wherein the wetting agent is chosen from the group consisting of polyoxyethylene monostearate ester, bis(hydroxyethyl)tallow amine, sodium dioctyl sulfosuccinate, polyoxyethylene dioleate ester, ethoxylated sorbitan laurate, sodium alkyl sulfonate, and sodium lauryl sulfate.
Claim 6
Dependent Claim
14 words
The absorbent material of claim 2 wherein the wetting agent is ethoxylated sorbitan laurate.
Claim 7
Dependent Claim
14 words
The absorbent material of claim 2 wherein the wetting agent is sodium alkyl sulfonate.
Claim 8
Dependent Claim
14 words
The absorbent material of claim 3 wherein the wetting agent is ethoxylated sorbitan laurate.
Claim 9
Dependent Claim
14 words
The absorbent material of claim 3 wherein the wetting agent is sodium alkyl sulfonate.
References Cited (Backward Citations)
US4049493A
Cited
US4156628A
Cited
US4257842A
Cited
US4082886A
Cited
US4289580A
Cited
US4286030A
Cited
US4296168A
Cited
US4319956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |