US5553852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-piece solid golf ball
Assignee: Bridgestone Sports Co Ltd
•
Filing: 1994-07-08
•
Granted: 1996-09-10
•
Expires: 2014-07-08
Abstract
Abstract A three-piece solid golf ball comprising a center core, an intermediate layer, and a cover. The center core (1) has a diameter of at least 29 mm, a hardness in the range of 45-80 JIS C and a specific gravity of less than 1.4. The intermediate layer (2) has a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale. The cover (3) has a thickness of 1-3 mm and a hardness of 50-85 JIS C. The ball has a good total balance of properties in that feeling and controllability are improved at no sacrifice of flying performance and durability.
Inventors
- 👤 Hiroshi Higuchi
- 👤 Hisashi Yamagishi
- 👤 Yoshinori Egashira
- 👤 Tadatoshi Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:08
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/02; A63B37/0003; A63B37/0023; A63B37/0029; A63B37/0031; A63B37/0033; A63B37/0038; A63B37/0039; A63B37/004; A63B37/0043; A63B37/0045; A63B37/0047; A63B37/005; A63B37/006; A63B37/0062; A63B37/00621; A63B37/0064; A63B37/0066; A63B37/007; A63B37/0072; A63B37/0075
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A three-piece solid golf ball comprising; a center core, an intermediate layer, and a cover enclosing the core through the intermediate layer, said center core having a diameter of at least 29 mm and a specific gravity of less than 1.4, said intermediate layer having a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale, the specific gravity of said intermediate layer being lower than the specific gravity of said center core, and said cover having a thickness of 1 to 3 mm and being softer than said intermediate layer.
Claim 2
Dependent Claim
105 words
A three-piece solid golf ball comprising; a center core, an intermediate layer, and a cover enclosing the core through the intermediate layer, said center core having a diameter of at least 29 mm and a specific gravity of less than 1.4, said intermediate layer having a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale, the specific gravity of said intermediate layer being lower than the specific gravity of said center core, and said cover having a thickness of 1 to 3 mm and being softer than said intermediate layer.
Claim 3
Dependent Claim
20 words
The golf ball of claim 1 wherein said intermediate layer is formed of a high repulsion ionomer resin base composition.
Claim 4
Dependent Claim
35 words
The golf ball of claim 1 wherein said center core has a hardness of 45 to 80 on JIS C scale and said cover has a hardness of 50 to 85 on JIS C scale.
Claim 5
Dependent Claim
18 words
The golf ball of claim 1 wherein said center core is comprised of a polybutadiene base rubber composition.
Claim 6
Dependent Claim
20 words
The golf ball of claim 1 wherein the diameter of said center core is in the range of 29-37 mm.
Claim 7
Dependent Claim
29 words
The golf ball of claim 1 wherein a difference in the specific gravity between the center core and the intermediate layer is in the range of 0.1 to 0.5.
Claim 8
Dependent Claim
22 words
The golf ball of claim 1 wherein the specific gravity of said intermediate layer is in the range of 0.9 to 1.0.
Claim 9
Dependent Claim
22 words
The golf ball of claim 1 wherein the hardness of said intermediate layer is in the range of 85-100 on JIS C.
References Cited (Backward Citations)
US4714253A
Cited
US4650193A
Cited
GB2185890A
Cited
US4781383A
Cited
GB2228874A
Cited
US5048838A
Cited
GB2232162A
Cited
US5184828A
Cited
US5184828B1
Cited
FR2666018A1
Cited
US5253871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-10 | 2000-03-11 | 2000-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-10 | 2004-03-11 | 2004-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-10 | 2008-03-11 | 2008-09-10 | $7700.00 | Window Closed / Lapsed |