Patent US4975476A successfully refreshed from Google Patents.
US4975476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous materials
Assignee: Dow Chemical Co
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Filing: 1990-01-25
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Granted: 1990-12-04
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Expires: 2010-01-25
Abstract
Abstract A composition useful as a pavement material comprising a mixture of asphalt and a polymer of an α-olefin, or an interpolymer of an α-olefin, and at least one copolymer selected from the group consisting of an α, β-unsaturated carboxylic acid, a monomer of an α,β-unsaturated carboxylic acid, a vinyl ester of alkanoic acid, and carbon monoxide.
Inventors
- 👤 David L. Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:33
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A composition which comprises: asphalt and blended therewith from about 1 to 50 parts by weight of an interpolymer of an α-olefin and carbon monoxide, wherein said interpolymer has a melting point between about 140° F. and 350° F., a melt flow index ranging from about 50 to about 3000 and is dispersible in said asphalt.
Claim 2
Dependent Claim
56 words
A composition which comprises: asphalt and blended therewith from about 1 to 50 parts by weight of an interpolymer of an α-olefin and carbon monoxide, wherein said interpolymer has a melting point between about 140° F. and 350° F., a melt flow index ranging from about 50 to about 3000 and is dispersible in said asphalt.
Claim 3
Dependent Claim
31 words
The composition of claim 1, wherein the olefinic polymer is an interpolymer of an ethylene and carbon monoxide containing from about 1 to about 30 percent by weight of carbon monoxide.
References Cited (Backward Citations)
US3980598A
Cited
US4839404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |