US4260694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
p-Methylstyrene diene block copolymers
Assignee: Mobil Oil AS
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Filing: 1979-11-29
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Granted: 1981-04-07
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Expires: 1999-11-29
Abstract
Abstract This invention provides an A-B-A p-methylstyrene-conjugated diene-p-methylstyrene block copolymer containing, by weight of the block copolymer, about 10-40% p-methylstyrene and about 90-60% conjugated diene.
Inventors
- 👤 Frederick C. Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:32
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F297/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
21 words
An A-B-A p-methylstyrene-conjugated diene-p-methylstyrene block copolymer containing, by weight of the block copolymer, about 10-40% p-methylstyrene and about 90-60% conjugated diene.
Claim 2
Dependent Claim
21 words
An A-B-A p-methylstyrene-conjugated diene-p-methylstyrene block copolymer containing, by weight of the block copolymer, about 10-40% p-methylstyrene and about 90-60% conjugated diene.
Claim 3
Dependent Claim
12 words
The block copolymer of claim 1, wherein said conjugated diene is isoprene.
Claim 4
Dependent Claim
12 words
The block copolymer of claim 1, wherein said conjugated diene is butadiene.
Claim 5
Dependent Claim
14 words
The block copolymer of claim 2 containing about 30% p-methylstyrene and about 70% isoprene.
Claim 6
Dependent Claim
14 words
The block copolymer of claim 3 containing about 30% p-methylstyrene and about 70% butadiene.
References Cited (Backward Citations)
US3333024A
Cited
US3439064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |