US3853798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous composition
Assignee: BP PLC
•
Filing: 1972-03-22
•
Granted: 1974-12-10
•
Expires: 1992-03-22
Abstract
Abstract A bituminous composition is prepared by blending bitumen, an aromatic flux oil and an E P T rubber latex and blowing the mixture. The resulting composition is homogeneous and even when stored hot, little or no separation of the components take place. It is particularly suitable for use as a roofing or sealing material.
Inventors
- 👤 M Oelsner
- 👤 E Zenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:50
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PRODUCTION OF AN ASPHALTIC COMPOSITION WHICH COMPRISES
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PRODUCTION OF AN ASPHALTIC COMPOSITION WHICH COMPRISES
Claim 3
Dependent Claim
72 words
FORMING A MIXTURE OF: 10-85% WT., BASED ON THE TOTAL MIXTURE, OF AN ASPHALT 5-25% WT., BASED ON THE TOTAL MIXTURE, OF AN ELASTOMER WHICH IS A COPOLYMER OF ETHYLENE, PROPYLENE AND A CYCLIC UNSATURATED HYDROCARBON HAVING MORE THAN ONE OLEFINIC DOUBLE BOND AND HAVING ALSO AN ENDOCYCLIC BRIDGE CONTAINING AT LEAST ONE METHYLENE GROUP, AND 10-85% WT., BASED ON THE TOTAL MIXTURE, OF A FLUX OIL FOR EXTENDING THE ELASTOMER, AND
Claim 4
Dependent Claim
72 words
FORMING A MIXTURE OF: 10-85% WT., BASED ON THE TOTAL MIXTURE, OF AN ASPHALT 5-25% WT., BASED ON THE TOTAL MIXTURE, OF AN ELASTOMER WHICH IS A COPOLYMER OF ETHYLENE, PROPYLENE AND A CYCLIC UNSATURATED HYDROCARBON HAVING MORE THAN ONE OLEFINIC DOUBLE BOND AND HAVING ALSO AN ENDOCYCLIC BRIDGE CONTAINING AT LEAST ONE METHYLENE GROUP, AND 10-85% WT., BASED ON THE TOTAL MIXTURE, OF A FLUX OIL FOR EXTENDING THE ELASTOMER, AND
Claim 5
Dependent Claim
23 words
BLOWING THE MIXTURE AT 180*-260*C WITH A GAS WHICH CONTAINS ELEMENTAL OXYGEN, THE ELASTOMER BEING IN LATEX FORM WHEN ADDED TO THE ASPHALT.
Claim 6
Dependent Claim
23 words
BLOWING THE MIXTURE AT 180*-260*C WITH A GAS WHICH CONTAINS ELEMENTAL OXYGEN, THE ELASTOMER BEING IN LATEX FORM WHEN ADDED TO THE ASPHALT.
Claim 7
Dependent Claim
23 words
blowing the mixture at 180*-260*C with a gas which contains elemental oxygen, the elastomer being in latex form when added to the asphalt.
Claim 8
Dependent Claim
23 words
blowing the mixture at 180*-260*C with a gas which contains elemental oxygen, the elastomer being in latex form when added to the asphalt.
Claim 9
Dependent Claim
23 words
A process according to claim 1 in which the asphalt and the flux oil are blended together before the elastomer latex is added.
Claim 10
Dependent Claim
30 words
A process according to claim 2 wherein the elastomer latex is incorporated into the blended asphalt/flux oil by blowing under milder conditions than those required to form the final composition.
Claim 11
Dependent Claim
18 words
A process according to claim 1 wherein the elastomer latex is a copolymer of ethylene, propylene and dicyclopentadiene.
Claim 12
Dependent Claim
14 words
A process according to claim 1 wherein the flux oil is an aromatic extract.
Claim 13
Dependent Claim
19 words
A process according to claim 1 wherein the asphalt is heated to 150*-260*C before addition of the elastomer latex.
Claim 14
Dependent Claim
19 words
A process according to claim 6 wherein the asphalt is heated to 180*-230*C before addition of the elastomer latex.
Claim 15
Dependent Claim
18 words
A process according to claim 1 wherein the blowing of the composition is carried out in two stages.
Claim 16
Dependent Claim
17 words
A process according to claim 8 wherein the first stage is carried out at 180* - 230*C.
Claim 17
Dependent Claim
17 words
A process according to clAim 9 wherein the second stage is carried out at 230* - 260*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |