Patent US4232128A successfully refreshed from Google Patents.
US4232128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous shaped cellulose hydrate article with an improved cleaning effect
Assignee: Hoechst AG
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Filing: 1977-12-15
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Granted: 1980-11-04
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Expires: 1997-12-15
Abstract
Abstract A porous shaped article, especially a flat shaped sponge like article, in particular a sponge cloth, is disclosed which exhibits an improved cleaning effect and which comprises cellulose hydrate and from about 10 to about 80% by weight of polyolefin fibrids.
Inventors
- 👤 Wolfgang Michel
- 👤 Heinz Kalberer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; C08J2301/00; C08J2301/08; C08J2301/22; C08J2301/24; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
31 words
A porous shaped article comprising cellulose hydrate and polyolefin fibrids wherein said fibrids are present in an amount from about 10 to about 80 percent by weight of the shaped article.
Claim 2
Dependent Claim
31 words
A porous shaped article comprising cellulose hydrate and polyolefin fibrids wherein said fibrids are present in an amount from about 10 to about 80 percent by weight of the shaped article.
Claim 3
Dependent Claim
22 words
The porous shaped article as defined in claim 1, comprising from about 20 to about 40 percent by weight of polyolefin fibrids.
Claim 4
Dependent Claim
25 words
The porous shaped article as defined in claim 1, wherein the polyolefin fibrids have an average length of from about 0.05 to about 15 mm.
Claim 5
Dependent Claim
25 words
The porous shaped article as defined in claim 3, wherein the polyolefin fibrids have an average length of from about 1 to about 3 mm.
Claim 6
Dependent Claim
39 words
The porous shaped article as defined in claim 1, wherein the polyolefin fibrids are comprised of a polymer selected from the group consisting of a homopolymer of a lower alkylene and a copolymer of at least two lower alkylenes.
Claim 7
Dependent Claim
18 words
The porous shaped article as defined in claim 5, wherein the lower alkylene is ethylene, propylene or butene-1.
Claim 8
Dependent Claim
46 words
The porous shaped article as defined in claim 1, wherein the polyolefin is a copolymer of a major portion of an olefin selected from the group consisting of ethylene and propylene and a monomer selected from the group consisting of vinyl esters and acrylic acid derivatives.
Claim 9
Dependent Claim
16 words
The porous shaped article as defined in claim 7, wherein the polyolefin is a low-pressure polyethylene.
Claim 10
Dependent Claim
25 words
The porous shaped article as defined in claim 1, wherein the polyolefin fibrids have a specific surface of more than about 1 m 2 /g.
Claim 11
Dependent Claim
23 words
The porous shaped article as defined in claim 9, wherein the specific surface is from about 1 to about 100 m 2 /g.
Claim 12
Dependent Claim
23 words
The porous shaped article as defined in claim 10, wherein the specific surface is from about 5 to about 25 m 2 /g.
Claim 13
Dependent Claim
40 words
The porous shaped article as defined in claim 1, wherein the polyolefin fibrids further comprise an amount of from about 0.05 to about 3.0 percent by weight, of a surface-active hydrophilic organic compound, relative to the weight of the fibrids.
Claim 14
Dependent Claim
26 words
The porous shaped article as defined in claim 12, wherein the amount of the surface active compound is from about 0.1 to about 1.0% by weight.
Claim 15
Dependent Claim
37 words
The porous shaped article as defined in claim 1, further comprising particles of a synthetic polymer having an average diameter of from about 0.1 to about 2 mm attached to at least a portion of its surface.
Claim 16
Dependent Claim
18 words
The porous shaped article as defined in claim 1, which is in the form of a sponge cloth.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |