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US4671208A
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Clay and limestone composition
Assignee: INTERNATIONAL PACKAGING ABSORBENTS Corp F/K/A INTERNATIONAL PACKAGING Inc
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Filing: 1984-12-07
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Granted: 1987-06-09
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Expires: 2004-12-07
Abstract
Abstract A composition of ground clay and crushed limestone is disclosed. The composition is particularly useful as a cat litter.
Inventors
- 👤 George N. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0154
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
The use as a cat litter of a composition comprising 40-90% ground dried clay which has been dried to a temperature not in excess of about 700° F. and 10-60% crushed limestone.
Claim 2
Dependent Claim
32 words
The use as a cat litter of a composition comprising 40-90% ground dried clay which has been dried to a temperature not in excess of about 700° F. and 10-60% crushed limestone.
Claim 3
Dependent Claim
32 words
The use as a cat litter of a composition as in claim 1 wherein the ground dried clay comprises 60-80% of the composition and the crushed limestone comprises 20-40% of the composition.
Claim 4
Dependent Claim
21 words
The use as a cat litter of a composition as in claim 1 wherein the crushed limestone is crushed dolomitic limestone.
Claim 5
Dependent Claim
36 words
The use as a cat litter of a composition as in claim 1 wherein the ground dried clay has a particle size of 8/45 mesh and the crushed limestone has a particle size of 16/25 mesh.
Claim 6
Dependent Claim
20 words
The use as a cat litter of a composition as in claim 4 wherein the crushed limestone is dolomitic limestone.
Claim 7
Dependent Claim
17 words
The use as a cat litter of a composition as in claim 1 further comprising a fragrance.
Claim 8
Dependent Claim
21 words
The use as a cat litter of a composition as in claim 1 wherein the ground dried clay is Attapulgite clay.
Claim 9
Dependent Claim
21 words
The use as a cat litter of a composition as in claim 1 wherein the ground dried clay in Montmorillonite clay.
References Cited (Backward Citations)
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Cited
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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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |