Patent US5019319A successfully refreshed from Google Patents.
US5019319A
Expired / Lapsed
US
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Golf ball
Assignee: Bridgestone Corp
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Filing: 1990-03-08
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Granted: 1991-05-28
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Expires: 2010-03-08
Abstract
Abstract A one-piece golf ball or a core of a multi-layered golf ball is formed from a rubber composition containing a base rubber component in the form of a modified rubber which is prepared by introducing an unsaturated carboxylate group into a polybutadiene rubber. The ball is satisfactorily durable and shows good flying performance.
Inventors
- 👤 Makoto Nakamura
- 👤 Toshio Honda
- 👤 Toshio Chikaraishi
- 👤 Yukio Fukuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/28; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/0029; A63B37/0031; A63B37/0033; A63B37/005; A63B37/0051; A63B37/006; A63B37/0062; A63B37/0064; A63B37/0067; A63B37/007; A63B37/0072; A63B37/0073; A63B37/0074; A63B37/0075; A63B37/0077; A63B37/0084; A63B37/0087; Y; Y10; Y10S; Y10S524/00; Y10S524/908
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A one-piece or core of a multi-layered golf ball comprising a rubber composition comprising a modified diene rubber, said diene rubber being selected from the group consisting of polybutadiene rubbers, natural rubbers, and polyisoprene rubbers, and said modified diene rubber including a group having the formula: ##STR8## wherein R is hydrogen or an alkyl radical having 1 to 5 carbon atoms, wherein the group of formula (1) is present in an amount of about 1/500 to about 1/20,000 molar equivalent per unit weight of said diene rubber, about 10 to about 50 parts by weight of a co-crosslinking agent, about 0.5 to about 5 parts by weight of a free radical releasing agent, and about 10 to about 80 parts by weight of a filler per 100 parts by weight of the base rubber component.
Claim 2
Dependent Claim
135 words
A one-piece or core of a multi-layered golf ball comprising a rubber composition comprising a modified diene rubber, said diene rubber being selected from the group consisting of polybutadiene rubbers, natural rubbers, and polyisoprene rubbers, and said modified diene rubber including a group having the formula: ##STR8## wherein R is hydrogen or an alkyl radical having 1 to 5 carbon atoms, wherein the group of formula (1) is present in an amount of about 1/500 to about 1/20,000 molar equivalent per unit weight of said diene rubber, about 10 to about 50 parts by weight of a co-crosslinking agent, about 0.5 to about 5 parts by weight of a free radical releasing agent, and about 10 to about 80 parts by weight of a filler per 100 parts by weight of the base rubber component.
Claim 3
Dependent Claim
20 words
The golf ball of claim 1 which is a one-piece golf ball, said ball being formed from said rubber composition.
Claim 4
Dependent Claim
34 words
The golf ball of claim 1 which is a multi-layered golf ball having a core coated with a cover material with or without an intermediate layer, said core being formed from said rubber composition.
Claim 5
Dependent Claim
14 words
The golf ball of claim 1 wherein the diene rubber is a polybutadiene rubber.
Claim 6
Dependent Claim
29 words
The golf ball of claim 4, wherein group of formula (1) is present in an amount of 1/2,000 to 1/15,000 molar equivalent per unit weight of said diene rubber.
Claim 7
Dependent Claim
19 words
The golf ball of claim 1, wherein the modified diene rubber has a molecular weight of at least 500.
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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |