US4965129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article for absorbing liquids
Assignee: EIDP Inc
•
Filing: 1989-08-01
•
Granted: 1990-10-23
•
Expires: 2009-08-01
Abstract
Abstract A sausage-shaped liquid-absorbing article is provided which includes within a porous fabric fine, fibrous particles of flash-spun polyethylene, optionally particles of foamed organic polymer, and an effective amount of a wetting agent. The article is capable of absorbing oils or aqueous liquids in amounts equal to at least six times the weight of the particles.
Inventors
- 👤 Thomas I. Bair
- 👤 Dimitri P. Zafiroglu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/25; Y10T428/254; Y10T428/27; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2927; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
An improved liquid-absorbing article having a porous outer fabric of generally cylindrical shape which is closed at both ends and is substantially filled with an absorbent material which comprises fine, fibrous, polyolefin particles, wherein the improvement comprises at least 50% by weight of the fine, fibrous polyolefin particles being composed of flash-spun polyethylene and the absorbent material comprising an effective amount of a wetting agent.
Claim 2
Dependent Claim
65 words
An improved liquid-absorbing article having a porous outer fabric of generally cylindrical shape which is closed at both ends and is substantially filled with an absorbent material which comprises fine, fibrous, polyolefin particles, wherein the improvement comprises at least 50% by weight of the fine, fibrous polyolefin particles being composed of flash-spun polyethylene and the absorbent material comprising an effective amount of a wetting agent.
Claim 3
Dependent Claim
26 words
An article in accordance with claim 1 wherein the bulk density of the absorbent material is in the range of 0.045 to 0.075 g/cm 3 .
Claim 4
Dependent Claim
22 words
An article in accordance with claim 2 wherein the bulk density is in the range of 0.05 to 0.07 g/cm 3 .
Claim 5
Dependent Claim
22 words
An article in accordance with claim 1, 2 or 3 wherein substantially all the particles of absorbent material are of flash-spun polyethylene.
Claim 6
Dependent Claim
18 words
An article in accordance with claim 4 wherein the flash-spun polyethylene particles are composed of oriented polyethylene polymer.
Claim 7
Dependent Claim
28 words
An article in accordance with claim 1 or 2 wherein no more than 50% by weight of the absorbent material is composed of particles of foamed organic polymer.
Claim 8
Dependent Claim
26 words
An article in accordance with claim 6 wherein the foamed organic polymer is selected from the group consisting of polypropylene, polyester and polystyrene or copolymers thereof.
Claim 9
Dependent Claim
28 words
An article in accordance with claim 1, 2 or 3 wherein the wetting agent amounts to between 0.5 and 5% of the total weight of the absorbent material.
Claim 10
Dependent Claim
28 words
An article in accordance with claim 1, 2 or 3 wherein the wetting agent amounts to between 2 and 4% of the total weight of the absorbent material.
Claim 11
Dependent Claim
24 words
An article in accordance with claim 1, 2 or 3 wherein the wetting agent has a surface tension of no greater than 40 dynes/cm.
Claim 12
Dependent Claim
20 words
An article in accordance with claim 10 wherein the surface tension is in the range of 25 to 35 dynes/cm.
Claim 13
Dependent Claim
19 words
An article in accordance with claim 8 wherein the wetting agent is an alkyl phenoxy polyethylene oxide nonionic surfactant.
Claim 14
Dependent Claim
17 words
An article in accordance with claim 8 wherein the wetting agent is an amphoteric derivative coconut oil.
Claim 15
Dependent Claim
28 words
An article in accordance with claim 1, 2 or 3 wherein the absorbent material has a specific absorption of at least six for oils or for aqueous liquids.
Claim 16
Dependent Claim
52 words
An article in accordance, with claim 14 wherein the absorbent material comprises at least 50% by weight of flash-spun oriented polyethylene particles, no more than 45% by weight of foamed polypropylene particles, and an alkyl phenoxy polyethylene oxide nonionic surfactant amounting to between 1 and 2.5% by weight of the absorbent material.
Claim 17
Dependent Claim
51 words
An article in accordance with claim 14 wherein the absorbent material comprises at least 50% by weight of flash-spun oriented polyethylene particles, no more than 45% by weight of foamed polypropylene particles, and an amphoteric derivative of coconut oil amounting to between 1 and 2.5% by weight of the absorbent material.
References Cited (Backward Citations)
GB891945A
Cited
US3169899A
Cited
US3227784A
Cited
US4600545A
Cited
US4070287A
Cited
US4052306A
Cited
US4240416A
Cited
US4458042A
Cited
US4497712A
Cited
US4537733A
Cited
US4659478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |