Patent US4839404A successfully refreshed from Google Patents.
US4839404A
Expired / Lapsed
US
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Bituminous compositions having high adhesive properties
Assignee: Dow Chemical Co
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Filing: 1986-07-28
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Granted: 1989-06-13
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Expires: 2006-07-28
Abstract
Abstract A composition useful as a pavement material comprising a mixture of asphalt, aggregate and an interpolymer of an α-olefin monomer selected from the group consisting of an α,β-ethylenically unsaturated carboxylic acid or an ionomer of an α,β-ethylenically unsaturated carboxylic acid.
Inventors
- 👤 Dane Chang
- 👤 David L. Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:56
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A composition comprising a bitumen from about 98 to about 99.9 percent by weight, about 0.1 to about 2 percent by weight of at least one copolymer of an α-olefin monomer and an α,β-ethylenically unsaturated carboxylic acid comonomer or ionomer thereof wherein the copolymer comprises from about 5 to about 30 weight percent of the α,β-ethylenically unsaturated carboxylic acid comonomer and about 95 to about 70 weight percent of the α-olefin monomer and wherein the composition is further characterized as being substantially free of α-olefin/ester copolymers.
Claim 2
Dependent Claim
86 words
A composition comprising a bitumen from about 98 to about 99.9 percent by weight, about 0.1 to about 2 percent by weight of at least one copolymer of an α-olefin monomer and an α,β-ethylenically unsaturated carboxylic acid comonomer or ionomer thereof wherein the copolymer comprises from about 5 to about 30 weight percent of the α,β-ethylenically unsaturated carboxylic acid comonomer and about 95 to about 70 weight percent of the α-olefin monomer and wherein the composition is further characterized as being substantially free of α-olefin/ester copolymers.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the comonomer is selected from the group consisting of acrylic acid and methacrylic acid.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein the copolymer has a melt flow index ranging from 1.5 g/10 min to about 3000 g/10 min.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein the copolymer contains from about 8 to about 20 percent of acrylic acid, ethacrylic acid or mixtures of methacrylic acid and acrylic acid.
Claim 6
Dependent Claim
11 words
The composition of claim 1 including in addition a mineral aggregate.
Claim 7
Dependent Claim
22 words
The composition of claim 1 wherein the copolymer is present in an amount of about 1 percent or less of the composition.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |