Patent US4775473A successfully refreshed from Google Patents.
US4775473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaged absorbent
Assignee: Oil Dri Corp of America
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Filing: 1987-03-09
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Granted: 1988-10-04
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Expires: 2007-03-09
Abstract
Abstract An absorbent article suitable for absorption of aqueous as well as oleaginous liquids such as metal cutting fluids, hydraulic fluids, oils and the like is disclosed. The absorbent article is a spunlaced material sleeve closed at both ends and filled with an inherently flameproof particulate material, such as particulate clay material, having a certain particle size range. The spunlaced material is liquid permeable, oleophilic, and hydrophilic. The spunlaced material also has a liquid wicking rate that is at least equal to that of the particulate clay material contained within the sleeve. Preferred spunlaced materials are woodpulp/polyester spunlaced materials having a woodpulp-rich face and a polyester-rich face. The polyester-rich face is situated contiguous to the particulate absorbent material.
Inventors
- 👤 Mark S. Johnson
- 👤 Manojlo Jovanovic
- 👤 Rudolph C. Valenta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:46
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
An absorbent article suitable for removing oleaginous and aqueous liquids from a solid surface and comprising a spunlaced material sleeve that is liquid-permeable, oleophilic, hydrophilic, and closed at both ends; and an oil-and-water absorbing, particulate clay material contained within said sleeve; said spunlaced material having a liquid wicking rate at least equal to that of said particulate clay material; and said particulate clay material having a particle size that passes through U.S. Sieve Series 30-mesh screen but is retained on U.S. Sieve Series 200-mesh screen and having an affinity for said oil and said water that is greater than that of said spunlaced material.
Claim 2
Dependent Claim
104 words
An absorbent article suitable for removing oleaginous and aqueous liquids from a solid surface and comprising a spunlaced material sleeve that is liquid-permeable, oleophilic, hydrophilic, and closed at both ends; and an oil-and-water absorbing, particulate clay material contained within said sleeve; said spunlaced material having a liquid wicking rate at least equal to that of said particulate clay material; and said particulate clay material having a particle size that passes through U.S. Sieve Series 30-mesh screen but is retained on U.S. Sieve Series 200-mesh screen and having an affinity for said oil and said water that is greater than that of said spunlaced material.
Claim 3
Dependent Claim
20 words
The absorbent article in accordance with claim 1 wherein said spunlaced fibrous material is an oil-and-water wettable spunlaced polyester fabric.
Claim 4
Dependent Claim
21 words
The absorbent article in accordance with claim 1 wherein said spunlaced material is an oil-and-water wettable spunlaced polyester and woodpulp fabric.
Claim 5
Dependent Claim
34 words
The absorbent article in accordance with claim 1 wherein the particulate clay material has a particle size that passes through U.S. Sieve Series 60-mesh screen but is retained on U.S. Sieve Series 200-mesh screen.
Claim 6
Dependent Claim
34 words
The absorbent article in accordance wtih claim 1 wherein the particulate clay material has a particle size that passes through U.S. Sieve Series 70-mesh screen but is retained on U.S. Sieve Series 200-mesh screen.
Claim 7
Dependent Claim
34 words
The absorbent article in accordance with claim 1 wherein the particulate clay material has a particle size that passes through U.S. Sieve Series 80-mesh screen but is retained on U.S. Sieve Series 200-mesh screen.
Claim 8
Dependent Claim
32 words
The absorbent article in accordance with claim 1 wherein said spunlaced material has a polyester-rich face and a woodpulp-rich face, and wherein the particulate clay material is contiguous to said polyester-rich face.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |