US4797434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of particulate bituminized plastics material
Assignee: Denehunt Ltd
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Filing: 1986-04-23
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Granted: 1989-01-10
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Expires: 2006-04-23
Abstract
Abstract A process for the manufacture of particulate material, and particularly material for constructing a horse riding surface, involves mixing raw granulated plastics material, such as PVC from waste electric cable, with a bitumen emulsion and water in such a way that the granules are coated while significant agglomeration is avoided. The bitumen emulsion is preferably 40% cationic. The water may be added as a bulk at lower pressure and a small amount at high pressure which is moved around to promote mixing.
Inventors
- 👤 Frederick D. Lovatt-Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:42
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A process for manufacturing particulate bitumenized plastics material, comprising the steps of providing raw granulated plastics material, adding to said plastics material cationic bitumen emulsion and water to form a mixture, the quantity of added water being substantially greater than the quantity of bitumen emulsion, agitating said mixture to produce particulate plastics material coated with bitumen in which significant agglomeration of the particles is avoided, and separating said particulate material coated with bitumen from said water.
Claim 2
Dependent Claim
76 words
A process for manufacturing particulate bitumenized plastics material, comprising the steps of providing raw granulated plastics material, adding to said plastics material cationic bitumen emulsion and water to form a mixture, the quantity of added water being substantially greater than the quantity of bitumen emulsion, agitating said mixture to produce particulate plastics material coated with bitumen in which significant agglomeration of the particles is avoided, and separating said particulate material coated with bitumen from said water.
Claim 3
Dependent Claim
14 words
A process as claimed in claim 1 wherein the bitumen emulsion is 40% cationic.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1 wherein the raw plastics material comprises polyvinylchloride and/or polyethylene.
Claim 5
Dependent Claim
25 words
A process as claimed in claim 1 wherein the quantity of emulsion used is in the range of 40-50 liters per ton of plastics material.
Claim 6
Dependent Claim
21 words
A process as claimed in claim 4, wherein the quantity of emulsion used is 44 liters per ton of plastics material.
Claim 7
Dependent Claim
27 words
A process as claimed in claim 1 wherein the quantity of water used is in the range of 200 to 250 liters per ton of plastics material.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 6, wherein the quantity of water used is 230 liters per ton of plastics material.
Claim 9
Dependent Claim
35 words
A process as claimed in claim 1 wherein the water is added as a relatively large quantity of water at a first pressure, and a relatively small quantity of water at a second, higher pressure.
Claim 10
Dependent Claim
27 words
A process as claimed in claim 8, wherein the volume ratio of lower pressure water to higher pressure water is in the range of 5:1 to 10:1.
Claim 11
Dependent Claim
20 words
A process as claimed in claim 8 wherein the position of supply of the higher pressure water is moved around.
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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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |