US4275684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Animal litter
Assignee: Mars Inc
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Filing: 1980-01-16
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Granted: 1981-06-30
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Expires: 2000-01-16
Abstract
Abstract An animal litter consisting of or containing a porous calcium silicate granulate or powder prepared by reacting silicon dioxide or materials containing the same with calcium oxide or materials containing the same in a CaO to SiO 2 molar ratio of 0.8:1 to 1.1:1, with homogenization thereof during the reaction by dispersing the solid starting materials in water with the addition of an anion-active surfactant previously converted in water to a microporous stable foam.
Inventors
- 👤 Walter Kramer
- 👤 Rainer Follmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0154
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
An animal litter consisting of or containing a porous calcium silicate granulate or powder having pore radii of less than 500μ, said calcium silicate granulate or powder being prepared by reacting crystalline and, if required, amorphous silicon dioxide, or materials containing the same, with calcium oxide or materials containing the same, in a CaO to SiO 2 molar ratio of 0.8:1 to 1.1:1, with homogenization thereof in water followed by molding, autoclave setting, comminuting, drying and grading with the further proviso that homogenization during the reaction has been carried out by dispersing the solid starting materials in water with the addition of an anion-active surfactant previously converted in water to a microporous stable foam.
Claim 2
Dependent Claim
114 words
An animal litter consisting of or containing a porous calcium silicate granulate or powder having pore radii of less than 500μ, said calcium silicate granulate or powder being prepared by reacting crystalline and, if required, amorphous silicon dioxide, or materials containing the same, with calcium oxide or materials containing the same, in a CaO to SiO 2 molar ratio of 0.8:1 to 1.1:1, with homogenization thereof in water followed by molding, autoclave setting, comminuting, drying and grading with the further proviso that homogenization during the reaction has been carried out by dispersing the solid starting materials in water with the addition of an anion-active surfactant previously converted in water to a microporous stable foam.
Claim 3
Dependent Claim
33 words
An animal litter according to claim 1, characterized in that the porous calcium silicate granulate or powder has pore radii of less than 100μ, more particularly less than 60μ, specifically 10 to 20μ.
Claim 4
Dependent Claim
27 words
An animal litter according to claim 1, characterized in that an anion-active surfactant is used with an active substance content of from 30 to 60%, e.g. 50%.
Claim 5
Dependent Claim
20 words
A calcium silicate granulate according to claim 1 or 3, characterized in that the anion-active surfactant is sodium lauryl sulphate.
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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |