US4599385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleic modified butene copolymers
Assignee: Hercules LLC
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Filing: 1984-10-10
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Granted: 1986-07-08
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Expires: 2004-10-10
Abstract
Abstract Graft copolymers are disclosed wherein maleic acid or maleic anhydride is grafted to a poly(propylene--butene) backbone. The grafts are useful materials for adhering polypropylene to other materials.
Inventors
- 👤 Anthony B. Clayton
- 👤 Brian D. Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:24
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A modified crystalline copolymer comprising about 1 to 25% by weight of butene-1 and about 99 to 75% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, grafted thereto, and having an intrinsic viscosity of about 0.55 to about 1.02.
Claim 2
Dependent Claim
57 words
A modified crystalline copolymer comprising about 1 to 25% by weight of butene-1 and about 99 to 75% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, grafted thereto, and having an intrinsic viscosity of about 0.55 to about 1.02.
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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |