Patent US4189238A successfully refreshed from Google Patents.
US4189238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recycled asphalt-aggregate process and apparatus
Assignee: Individual
•
Filing: 1978-01-09
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Granted: 1980-02-19
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Expires: 1998-01-09
Abstract
Abstract In a process for recycling asphalt and aggregate containing composition, the improvement comprises separating the composition into a plurality of portions having different particle sizes, ranging from coarse to fine, introducing the particle portions into different mixing and heating drums, one of the drums being for the coarse particle portion, and one or more additional drums for smaller particle portions, and heating the particles in the respective drums with hot gases of combustion at temperatures below that which will burn the asphalt particles in each of the respective drums.
Inventors
- 👤 Robert L. Mendenhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:09
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1013; E01C19/1027; E01C19/1036; E01C2019/1081; E01C2019/1095
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
In a process of recycling used and crushed solid asphaltic concrete composition particles comprising a mixture of asphalt and aggregate and having at least a portion of particles passing a No. 8 U.S. Series sieve the improvement comprising heating said composition particles passing said No. 8 sieve by direct exposure to hot gases of combustion having a maximum temperature below about 1000° F.
Claim 2
Dependent Claim
63 words
In a process of recycling used and crushed solid asphaltic concrete composition particles comprising a mixture of asphalt and aggregate and having at least a portion of particles passing a No. 8 U.S. Series sieve the improvement comprising heating said composition particles passing said No. 8 sieve by direct exposure to hot gases of combustion having a maximum temperature below about 1000° F.
Claim 3
Dependent Claim
21 words
The process of claim 1 including heating said composition until a composition temperature of at least about 225° F. is achieved.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein said particles are exposed to said hot gases of combustion for a time to avoid burning of the asphalt.
Claim 5
Dependent Claim
20 words
The process of claim 3 wherein the maximum temperature of the hot gases of combustion is below about 800° F.
Claim 6
Dependent Claim
64 words
In a process of recycling used and crushed solid asphaltic concrete composition particles comprising a mixture of asphalt and aggregate and having at least a portion of particles passing a No. 4 U.S. Series sieve the improvement comprising heating said composition particles passing said No. 4 sieve by direct exposure to hot gases of combustion having a maximum temperature of below about 1000° F.
Claim 7
Dependent Claim
64 words
In a process of recycling used and crushed solid asphaltic concrete composition particles comprising a mixture of asphalt and aggregate and having at least a portion of particles passing a No. 4 U.S. Series sieve the improvement comprising heating said composition particles passing said No. 4 sieve by direct exposure to hot gases of combustion having a maximum temperature of below about 1000° F.
Claim 8
Dependent Claim
21 words
The process of claim 5 including heating said composition until a composition temperature of at least about 225° F. is achieved.
Claim 9
Dependent Claim
25 words
The process of claim 6 wherein said particles are exposed to said hot gases of combustion for a time to avoid burning of the asphalt.
Claim 10
Dependent Claim
20 words
The process of claim 7 wherein the maximum temperature of the hot gases of combustion are below about 800° F.
References Cited (Backward Citations)
US1836261A
Cited
US3482824A
Cited
US3845941A
Cited
US3971666A
Cited
US4025057A
Cited
US3866888A
Cited
US3999743A
Cited
US4103350A
Cited
US4153471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |