US4781383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid three-piece golf ball
Assignee: KAMATARI Co Ltd A CORP OF JAPAN
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Filing: 1986-06-27
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Granted: 1988-11-01
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Expires: 2006-06-27
Abstract
Abstract A solid three piece golf ball made by covering a core, which consists of inner and outer layers, with a shell, the inner layer having a diameter of 24-29 mm and a hardness (Shore hardness D) of 15-30, the outer layer having a diameter of 36-41 mm and a hardness (Shore hardness D) of 55-65, the golf ball having a percentage of the area of the portion of the surface thereof which contacts a club face when the ball is struck by the club within a range of 27-35%.
Inventors
- 👤 Toshihiko Kamada
- 👤 Shunji Izumi
- 👤 Shinichi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:27
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/02; A63B37/0003; A63B37/0038; A63B37/004; A63B37/0043; A63B37/0045; A63B37/005; A63B37/006; A63B37/0062; A63B37/00622; A63B37/0066; A63B37/007; A63B37/0072; A63B37/0075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A solid three-piece golf ball having a core consisting of inner and outer layers, and a shell covering said core, characterized in that said inner layer has a diameter of 24-29 mm and a hardness (Shore hardness D) of 15-30, said outer layer having a diameter of 36-41 mm and a hardness (Shore hardness D) of 55-65, and the area of the portion of the surface of said golf ball which contacts a club face when said golf is struck by the club being 27-35% said area being determined by dividing the area of the portion of the surface of a ball which contacted the face of a driver (wood club #1) when the ball was struck by the driver at a head speed of 40 m/sec by the area of a diametrical cross section of the ball and multiplying the quotient by 100.
Claim 2
Dependent Claim
144 words
A solid three-piece golf ball having a core consisting of inner and outer layers, and a shell covering said core, characterized in that said inner layer has a diameter of 24-29 mm and a hardness (Shore hardness D) of 15-30, said outer layer having a diameter of 36-41 mm and a hardness (Shore hardness D) of 55-65, and the area of the portion of the surface of said golf ball which contacts a club face when said golf is struck by the club being 27-35% said area being determined by dividing the area of the portion of the surface of a ball which contacted the face of a driver (wood club #1) when the ball was struck by the driver at a head speed of 40 m/sec by the area of a diametrical cross section of the ball and multiplying the quotient by 100.
Claim 3
Dependent Claim
35 words
A solid three-piece golf ball according to claim 1, wherein said inner layer consists of a mixture of 100 parts by weight of cis-1,4-polybutadiene, 3-15 parts by weight of trimethylol propane trimethacrylate, and zinc oxide.
Claim 4
Dependent Claim
34 words
A solid three-piece golf ball according to claim 1, wherein said outer layer consists of a mixture of 100 parts by weight of cis-1,4-polybutadiene, 25-40 parts by weight of zinc diacylate, and zinc dioxide.
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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |