US5586950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Dunlop Sports Co Ltd
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Filing: 1994-12-29
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Granted: 1996-12-24
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Expires: 2014-12-29
Abstract
Abstract The present invention provides a golf ball which exhibits a large flying distance and is superior in stability of iron shot and hit feeling. The golf ball comprises a core and a cover for covering the core, the cover comprising two layers of an inner layer cover and an outer layer cover. A stiffness modulus of the inner layer cover is 3,000 to 5,500 kg/cm 2 and that of the outer layer cover being 1,000 to 2,500 kg/cm 2 . A thickness of the inner layer cover is 0.5 to 2.5 mm and that of the outer layer being 0.5 to 2.5 mm. A total thickness of the inner layer cover and the outer layer cover is 1.0 to 4.5 mm. A base resin of the inner layer cover contains 5 to 100% by weight of an ionomer neutralized with a zinc ion.
Inventors
- 👤 Seiichiro Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:37
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/0029; A63B37/0033; A63B37/007; A63B37/0072; A63B37/0075; Y; Y10; Y10S; Y10S273/00; Y10S273/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A golf ball comprising a core and a cover for covering said core, said cover comprising an inner layer cover and an outer layer cover, a stiffness modulus of the inner layer cover being 3,000 to 5,500 kg/cm 2 , a stiffness modulus of the outer layer cover being 1,000 to 2,500 kg/cm 2 , a thickness of the inner layer cover being 0.5 to 2.5 mm, a thickness of the outer layer being 0.5 to 2.5 mm, a total thickness of the inner layer cover and the outer layer cover being 1.0 to 4.5 mm, a base resin of the inner layer cover containing 5 to 100% by weight of an ionomer neutralized with a zinc ion, and a base resin of the outer layer cover containing 5 to 100% by weight of an ionomer.
Claim 2
Dependent Claim
136 words
A golf ball comprising a core and a cover for covering said core, said cover comprising an inner layer cover and an outer layer cover, a stiffness modulus of the inner layer cover being 3,000 to 5,500 kg/cm 2 , a stiffness modulus of the outer layer cover being 1,000 to 2,500 kg/cm 2 , a thickness of the inner layer cover being 0.5 to 2.5 mm, a thickness of the outer layer being 0.5 to 2.5 mm, a total thickness of the inner layer cover and the outer layer cover being 1.0 to 4.5 mm, a base resin of the inner layer cover containing 5 to 100% by weight of an ionomer neutralized with a zinc ion, and a base resin of the outer layer cover containing 5 to 100% by weight of an ionomer.
Claim 3
Dependent Claim
30 words
The golf ball according to claim 1 wherein said outer layer cover has a stiffness modulus of 1,000 to 2,300 Kg/cm 2 and a thickness of 0.6 to 2.3 mm.
Claim 4
Dependent Claim
30 words
The golf ball according to claim 1 wherein said inner layer cover has a stiffness modulus of 3,200 to 5,000 Kg/cm 2 and a thickness of 0.6 to 2.3 mm.
Claim 5
Dependent Claim
19 words
The golf ball according to claim 1 wherein said core is either a thread-wound core or a solid core.
Claim 6
Dependent Claim
31 words
The golf ball according to claim 1, wherein said base resin of said inner layer cover comprises from 10 to 100% by weight of an ionomer neutralized with a zinc ion.
Claim 7
Dependent Claim
32 words
The golf ball according to claim 1, wherein said base resin of said outer layer cover comprises from about 50 to 100% by weight of an ionomer neutralized with a zinc ion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-24 | 2000-06-24 | 2000-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-24 | 2004-06-24 | 2004-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-24 | 2008-06-24 | 2008-12-24 | $7700.00 | Window Closed / Lapsed |