US5222739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Dunlop Sports Co Ltd
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Filing: 1991-08-02
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Granted: 1993-06-29
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Expires: 2011-08-02
Abstract
Abstract The present invention provides a golf ball having excellent impact resilience and good flying performance, which comprises a core and a cover covering the core, wherein the cover contains at least 20 % by weight of a carboxyl-rich ionomer resin prepared by neutralizing 15 to 80 mol % of carboxylic acid groups of an olefinic copolymer containing 16 to 30 % by weight of an alpha, beta-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
Inventors
- 👤 Kuniyasu Horiuchi
- 👤 Seiichiro Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:19
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/025; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/005; A63B37/0051; A63B37/0053; A63B37/007; A63B37/0072; A63B37/0074; A63B37/0077; A63B37/0084; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A gold ball comprising a core and a cover covering said core, wherein said cover contains at least 20% by weight of a carboxyl-rich ionomer resin having a stiffness modulus of 3,000 to 6,000 Kgf/cm 2 , prepared by neutralizing 15 to 80 mol% of carboxylic acid groups of an olefinic copolymer containing 20 to 30% by weight of an α-β-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
Claim 2
Dependent Claim
70 words
A gold ball comprising a core and a cover covering said core, wherein said cover contains at least 20% by weight of a carboxyl-rich ionomer resin having a stiffness modulus of 3,000 to 6,000 Kgf/cm 2 , prepared by neutralizing 15 to 80 mol% of carboxylic acid groups of an olefinic copolymer containing 20 to 30% by weight of an α-β-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
Claim 3
Dependent Claim
45 words
The golf ball according to claim 1 wherein said olefinic copolymer is obtained by copolymerizing an alpha-olefin with an alpha, beta-ethylenic unsaturated carboxylic acid; an amount of the alpha, beta-ethylenic unsaturated carboxylic acid being 25 to 30% by weight based on the total monomer weight.
Claim 4
Dependent Claim
24 words
The golf ball according to claim 1 wherein said alpha, beta-ethylenic unsaturated carboxylic acid includes acrylic acid, methacrylic acid, maleic acid or fumaric acid.
Claim 5
Dependent Claim
14 words
The golf ball according to claim 1 wherein said alpha-olefin includes ethylene or propylene.
Claim 6
Dependent Claim
27 words
The golf ball according to claim 1 wherein said metal ions include lithium ions, sodium ions, potassium ions, magnesium ions, calcium ions, zinc ions or copper ions.
Claim 7
Dependent Claim
18 words
The golf ball according to claim 1 wherein said cover comprises the carboxyl-rich ionomer resin and an additive.
Claim 8
Dependent Claim
40 words
The golf ball according to claim 1, wherein said cover further comprises an ionomer resin having an olefinic copolymer having an α-β-ethylenic unsaturated carboxylic acid in an amount less than 15% by weight of said olefinic copolymer, and an additive.
Claim 9
Dependent Claim
18 words
The golf ball according to claim 1 wherein said core is a solid core or a thread-wound core.
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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |