US5656695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Dunlop Sports Co Ltd
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Filing: 1994-12-28
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Granted: 1997-08-12
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Expires: 2014-12-28
Abstract
Abstract A scratch resistant golf ball cover comprising a blend of: (I) an acrylic ionomer or mixture with a methacrylic ionomer having a stiffness modulus of 3000-5000 Kg/cm 2 (II) a methacrylic ionomer having a stiffness modulus of 900-2000 Kg/cm 2 neutralized with zinc.
Inventors
- 👤 Seiichiro Endo
- 👤 Kuniyasu Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:47
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/0003; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; A63B37/005; A63B37/0051; A63B37/0052; A63B37/0053; C08L2205/00; C08L2205/02; C08L23/0846; C08L23/0869; C08L23/0876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A golf ball having a core and a cover for covering the core, wherein said cover is composed of a base resin having a stiffness modulus of 1,000 to 4,000 Kg/cm 2 and said base resin is a mixture of the following two ionomers in a weight ratio (I)/(II) of 98/2 to 60/40; (I) an ionomer having a stiffness modulus of 3,000 to 5,000 Kg/cm 2 , being an acrylic ionomer (A) neutralized with alkali metal ion, alkali earth metal ion or zinc ion, or a mixture of the acrylic ionomer (A) and a methacrylic ionomer (B) neutralized with alkali metal ion, alkali earth metal ion or zinc ion, an amount of the acrylic ionomer (A) in the mixture being 10 to 100% by weight, (II) an ionomer having a stiffness modulus of 900 to 2000 Kg/cm 2 , being a methacrylic ionomer neutralized with zinc ion.
Claim 2
Dependent Claim
147 words
A golf ball having a core and a cover for covering the core, wherein said cover is composed of a base resin having a stiffness modulus of 1,000 to 4,000 Kg/cm 2 and said base resin is a mixture of the following two ionomers in a weight ratio (I)/(II) of 98/2 to 60/40; (I) an ionomer having a stiffness modulus of 3,000 to 5,000 Kg/cm 2 , being an acrylic ionomer (A) neutralized with alkali metal ion, alkali earth metal ion or zinc ion, or a mixture of the acrylic ionomer (A) and a methacrylic ionomer (B) neutralized with alkali metal ion, alkali earth metal ion or zinc ion, an amount of the acrylic ionomer (A) in the mixture being 10 to 100% by weight, (II) an ionomer having a stiffness modulus of 900 to 2000 Kg/cm 2 , being a methacrylic ionomer neutralized with 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) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |