Patent US4549834A successfully refreshed from Google Patents.
US4549834A
Expired / Lapsed
US
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Asphalt rejuvenating composition and process
Assignee: DERBY REFINING Co
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Filing: 1983-09-29
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Granted: 1985-10-29
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Expires: 2003-09-29
Abstract
Abstract The process and composition for improving asphalt paving by mining existing roads for their asphalt content, blending the mined or recycled asphalt with new asphalt which is unusually high in resin content to provide a pavement of increased ductility and improved penetration characteristics which will wear better.
Inventors
- 👤 Jerry R. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:55
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1004; C; C08; C08L; C08L95/00; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/265; E01C7/35; E01C7/358
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
An asphaltic composition especially suitable for rejuvenating recycled asphalt-aggregate road compositions, consisting essentially of from about 30% by weight to about 50% by weight of asphaltic oils, from about 40% by weight to about 60% by weight of asphaltic resins, and from about 3% by weight to about 20% by weight of asphaltic pitch.
Claim 2
Dependent Claim
54 words
An asphaltic composition especially suitable for rejuvenating recycled asphalt-aggregate road compositions, consisting essentially of from about 30% by weight to about 50% by weight of asphaltic oils, from about 40% by weight to about 60% by weight of asphaltic resins, and from about 3% by weight to about 20% by weight of asphaltic pitch.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the amount of asphaltic oils is from about 30% by weight to about 40% by weight.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein the amount of asphaltic pitch is from about 5% by weight to about 10% by weight.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein the amount of asphaltic oil is about 34%, the amount of asphaltic resin about 59%, and the amount of asphaltic pitch about 7%.
Claim 6
Independent Claim
68 words
The method of improving road life of asphaltic roads which are made of substantial amounts of old, reclaimed road aggregate which includes the old worn asphalt, in combination with an asphalt binder, consisting essentially of: employing as the asphaltic binder a high resin content asphalt, with a resin content within the range of from about 40% by weight to about 60% by weight of the asphalt binder component.
Claim 7
Dependent Claim
36 words
The method of claim 5 wherein the asphalt binder component comprises from about 30% by weight to about 50% by weight asphaltic oils, and from about 3% by weight to about 20% by weight asphaltic pitch.
Claim 8
Dependent Claim
24 words
The method of claim 6 wherein the asphaltic binder component copmprises from about 30% by weight to about 40% by weight of asphaltic oil.
Claim 9
Dependent Claim
24 words
The method of claim 7 wherein the asphaltic binder component comprises from about 3% by weight to about 20% by weight of asphaltic pitch.
Claim 10
Dependent Claim
39 words
The method of claim 5 wherein the amount of road aggregate is from about 90% to about 95% of the paving composition and the amount of asphaltic binder about 5% to about 10% by weight of the road composition.
Claim 11
Independent Claim
72 words
A method of rejuvenating hard, cracked and brittle asphaltic roadways consisting essentially of: breaking up the hard, cracked, and brittle asphaltic roadway, pulverizing the break-up material to a reusable size; mixing the pulverized material with high resin content asphaltic emulsion having a resin content of from about 40% to about 60% by weight of said high resin asphaltic emulsion to provide a rejuvenated composition, and re-laying the roadway with said rejuvenated composition.
Claim 12
Independent Claim
72 words
A method of rejuvenating hard, cracked and brittle asphaltic roadways consisting essentially of: breaking up the hard, cracked, and brittle asphaltic roadway, pulverizing the break-up material to a reusable size; mixing the pulverized material with high resin content asphaltic emulsion having a resin content of from about 40% to about 60% by weight of said high resin asphaltic emulsion to provide a rejuvenated composition, and re-laying the roadway with said rejuvenated composition.
Claim 13
Dependent Claim
14 words
The method of claim 10 wherein the mixing is a cold mix recycle step.
Claim 14
Dependent Claim
20 words
The method of claim 10 wherein the mixing is a hot mix recycle step and includes, in addition, fresh aggregate.
Claim 15
Dependent Claim
35 words
The method of claim 12 wherein the rejuvenated road is about 50% by weight pulverized old roadway and about 50% by weight of a composition of fresh aggregate containing said high resin content asphaltic emulsion.
Claim 16
Dependent Claim
34 words
The method of claim 13 wherein the fresh aggregate portion itself comprises about 90% to about 95% road aggregate and from about 5% to about 10% by weight of the high resin asphaltic component.
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |