US4164490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bitumen compositions containing polymers
Assignee: Koch Enterprises Inc
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Filing: 1977-10-07
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Granted: 1979-08-14
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Expires: 1997-10-07
Abstract
Abstract The invention is related to new bitumen compositions having improved rheological properties.
Inventors
- 👤 Germain Hagenbach
- 👤 Pierre Cazaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:10
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
Bitumen compositions comprising 90 to 99.9% by weight of a bitumen, the softening point of which is between 2° and 120° C., and 0.1 to 10% by weight of a norbornene homopolymer having an average molecular weight between 1,000,000 and 3,000,000.
Claim 2
Dependent Claim
41 words
Bitumen compositions comprising 90 to 99.9% by weight of a bitumen, the softening point of which is between 2° and 120° C., and 0.1 to 10% by weight of a norbornene homopolymer having an average molecular weight between 1,000,000 and 3,000,000.
Claim 3
Dependent Claim
15 words
Bitumen compositions according to claim 1 comprising 0.1 to 5% by weight of norbornene homopolymer.
Claim 4
Dependent Claim
15 words
Bitumen compositions according to claim 2 comprising 0.5 to 2% by weight of norbornene homopolymer.
Claim 5
Dependent Claim
26 words
Method of preparing the bitumen compositions according to claim 1 comprising dissolving the norbornene homopolymer in the bitumen at a temperature between 150° and 250° C.
Claim 6
Dependent Claim
37 words
Method of preparing the bitumen compositions according to claim 1 comprising dissolving the norbornene homopolymer in a heavy petroleum cut and then mixing the resulting solution with the bitumen at a temperature between 150° and 250° C.
Claim 7
Dependent Claim
18 words
Bitumen compositions according to claim 1 wherein the average molecular weight of the norbornene polymer is about 2,000,000.
Claim 8
Dependent Claim
33 words
Bitumen compositions according to claim 1 wherein said bitumen is a vacuum or atmospheric distillation residue of crude oil, an oxidized petroleum cut or mixture of said vacuum residue and said oxidized cut.
Claim 9
Dependent Claim
17 words
Method of preparing bitumen compositions according to claim 5 wherein said heavy petroleum cut is aromatic extracts.
Claim 10
Dependent Claim
16 words
Method of preparing bitumen compositions according to claim 5 wherein said heavy petroleum cut is kerosene.
References Cited (Backward Citations)
US3790519A
Cited
US3879323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |