Patent US5327387A successfully refreshed from Google Patents.
US4619862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate paper product, especially for use as animal litter
Assignee: Kadant Fibergen Inc
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Filing: 1983-04-05
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Granted: 1986-10-28
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Expires: 2003-04-05
Abstract
Abstract Discrete absorbant particles, useful for example as an animal litter, are produced by joining together layers of formed paper pulp, the layers being compressed together in such a way as to remain together under normal use conditions, prior to immersion in water, but so as to wholly or partially separate upon immersion in water, so that the particles are easily flushed down a toilet after use. The product also has uses other than for animal litter, such as in floor sweeping, as a mulch, packing, or otherwise.
Inventors
- 👤 Robert C. Sokolowski
- 👤 Russell L. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0155; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T428/25; Y10T428/253; Y10T428/29; Y10T428/2913; Y10T428/2927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A multiplicity of particles comprising agglomerated wood fibers having a generally irregular spherical shape and an internal layered structure, said particles being useful as an animal litter and having a bulk density from about 0.15 to about 0.25 grams per cubic centimeter.
Claim 2
Dependent Claim
42 words
A multiplicity of particles comprising agglomerated wood fibers having a generally irregular spherical shape and an internal layered structure, said particles being useful as an animal litter and having a bulk density from about 0.15 to about 0.25 grams per cubic centimeter.
Claim 3
Dependent Claim
12 words
The particles of claim 1 wherein the wood fibers are fiberized newsprint.
Claim 4
Dependent Claim
18 words
The particles of claim 2 having a size of from about 0.25 to about 0.375 inch in diameter.
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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |