US4881490A
Expired / Lapsed
US
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Absorbent composition, and method of making same
Assignee: Individual
•
Filing: 1988-02-19
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Granted: 1989-11-21
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Expires: 2008-02-19
Abstract
Abstract An absorbent composition is disclosed which is particularly useful as an improved animal or pet litter composition, or as an absorbent for aqueous systems or oleophilic materials such as petroleum or vegetable oils and the like. Also disclosed is a method of making the improved absorbent composition and litter composition containing same. The absorbent composition is comprised of clay and a nitrogenous compound absorber, such as cyclodextrin or other agents which form a matrix system or complex similar to cyclodextrin. Such other agents include polymerized cyclodextrin and cyclodextrin derivatives and polycarboxylic acid polymers such as a acrylate polymers.
Inventors
- 👤 Cyril L. Ducharme
- 👤 Ralph C. Eickhof
- 👤 David A. Heider
- 👤 Denny W. Neiberger
- 👤 Fred Maass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0155; A01K1/0154
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
47 words
In an absorbent composition comprised of clay as an absorbent material the improvement wherein said absorbent contains a nitrogenous compound absorber, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives, polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 2
Dependent Claim
47 words
In an absorbent composition comprised of clay as an absorbent material the improvement wherein said absorbent contains a nitrogenous compound absorber, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives, polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 3
Dependent Claim
25 words
An absorbent composition as defined in claim 1 wherein said nitrogenous compound absorber is present in an amount of about 0.05 to 2% by weight.
Claim 4
Dependent Claim
16 words
An absorbent composition as defined in claim 2 wherein said nitrogenous compound absorber is polymerized cyclodextrin.
Claim 5
Dependent Claim
27 words
An absorbent composition as defined in claim.2 wherein said nitrogenous compound absorber is a polyacrylate polymer selected from the group consisting of polyglycerol acrylate and polypropyl acrylate.
Claim 6
Dependent Claim
29 words
An absorbent composition as defined in claim 1 wherein said nitrogenous compound absorber is cyclodextrin which is present in an amount of about 0.05 to about 0.5% by weight
Claim 7
Dependent Claim
18 words
An absorbent composition as defined in claim 5 wherein said cyclodextrin is present in about 0.1% by weight.
Claim 8
Dependent Claim
21 words
An absorbent composition as defined in claim 6 wherein said cyclodextrin contains up to a 10% by weight load of fragrance.
Claim 9
Dependent Claim
23 words
An absorbent composition as defined in claim 1 in which said clay comprises at least 90% by weight of the total absorbent composition.
Claim 10
Dependent Claim
21 words
An absorbent composition as defined in claim 8 in which said clay comprises about 99% by weight of the absorbent composition.
Claim 11
Dependent Claim
26 words
An absorbent composition as defined in claim 1 in which said nitrogenous compound absorber is coated on the clay and adhered thereto with an adhesive binder.
Claim 12
Independent Claim
63 words
A method of preparing an absorbent composition useful as an animal litter having improved odor properties comprising adding to a clay absorbent material a nitrogenous compound absorber in an amount of between 0.05 to 2% by weight, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 13
Independent Claim
63 words
A method of preparing an absorbent composition useful as an animal litter having improved odor properties comprising adding to a clay absorbent material a nitrogenous compound absorber in an amount of between 0.05 to 2% by weight, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 14
Dependent Claim
28 words
A method as defined in claim 11 wherein an adhesive binder is applied to said clay in liquid form prior to the addition of said nitrogenous compound absorber.
Claim 15
Dependent Claim
62 words
A method as defined in claim 12 wherein said adhesive binder is applied in the form of an aqueous solution sprayed on clay particles having a particle size in the range of about 2 to about 7 mm and said nitrogenous compound absorber is cyclodextrin applied in the form of a dry powder which adheres to the clay through said adhesive binder.
Claim 16
Dependent Claim
20 words
A method as defined in claim 13 wherein said cyclodextrin is applied in an amount of about 0.1% by weight.
Claim 17
Dependent Claim
16 words
A method as defined in claim 14 in which said cyclodextrin carries an aromatic volatile fragrance.
Claim 18
Dependent Claim
63 words
A method as defined in claim 11 in which said nitrogenous compound absorber is cyclodextrin and is added to a mud of said clay and mixed with said clay mud so as to incorporate the cyclodextrin internally after which said mixture of clay and cyclodextrin is dried and ground to a particle size in the range of about 2 to about 7 mm.
Claim 19
Dependent Claim
27 words
A method as defined in claim 16 in which said cyclodextrin is added to said clay in an amount of about 0.05 to about 0.5% by weight.
Claim 20
Dependent Claim
21 words
A method as defined in claim 17 in which said cyclodextrin is added in an amount of about 0.1% by weight.
Claim 21
Dependent Claim
20 words
A method as defined in claim 11, wherein a dry cyclodextrin is added and mixed with a substantially dry clay.
Claim 22
Dependent Claim
26 words
A method as defined in claim 11, wherein said nitrogenous compound absorber is cyclodextrin and is applied as an aqueous dispersion to a substantially dry clay.
Claim 23
Dependent Claim
17 words
A method as defined in claim 20 wherein said aqueous dispersion of cyclodextrin is applied by spraying.
Claim 24
Dependent Claim
63 words
An animal litter having improved odor properties comprising an absorbent composition comprised of clay and a nitrogenous compound absorber, said absorbent composition having a particle size in the range of about 2 mm to about 7 mm, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives, polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 25
Dependent Claim
63 words
An animal litter having improved odor properties comprising an absorbent composition comprised of clay and a nitrogenous compound absorber, said absorbent composition having a particle size in the range of about 2 mm to about 7 mm, said nitrogenous compound absorber being selected from the group consisting of cyclodextrin, cyclodextrin derivatives, polymerized cyclodextrin and polyacrylate compounds having a matrix system similar to cyclodextrin.
Claim 26
Dependent Claim
28 words
An animal litter as defined in claim 22 in which said nitrogenous compound absorber is cyclodextrin present in an amount of about 0.05 to about 2% by weight.
Claim 27
Dependent Claim
22 words
An animal litter as defined in claim 23 in which said cyclodextrin is present in an amount of about 0.1% by weight.
Claim 28
Dependent Claim
17 words
An animal litter as defined in claim 23 in which said cyclodextrin carries an aromatic volatile fragrance.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
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