US4337946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Bridgestone Corp
•
Filing: 1980-11-06
•
Granted: 1982-07-06
•
Expires: 2000-11-06
Abstract
Abstract A golf ball having an intermediate layer of thermoplastic resin between a thread-wound central core and an outer polyester elastomer layer. The thermoplastic resin has a substantial melt flow initiation temperature of 160° C. or less, the substantial melt flow initiation temperature being the minimum temperature at which the melt index under a load of 4350 g. becomes 1 g/10 mins or more, and has a high adhesion property to the polyester elastomer cover. It is preferable that the thermoplastic resin have a resilience of 30% or more and that the intermediate layer of thermoplastic resin be within the range of 0.1 to 1.0 mm. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.
Inventors
- 👤 Tasuku Saito
- 👤 Tutomu Noma
- 👤 Tsutomu Matsunaga
- 👤 Nagayoshi Naito
- 👤 Chiaki Tanaka
- 👤 Motoki Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:55
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/12; A63B37/0003; A63B37/0038; A63B37/004; A63B37/0045; A63B37/005; A63B37/0051; A63B37/0053; A63B37/007; A63B37/0072; A63B37/0075; A63B37/0077; A63B37/008; A63B37/0083; A63B37/0084
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A golf ball comprising a thread-wound central core, an outer cover for the core, said cover being formed of a polyester elastomer and a layer of thermoplastic resin disposed between said cover and said core, said layer having a substantial melt flow initiation temperature of 160° C. or less, said substantial melt flow initiation temperature being the minimum temperature at which the melt index under a load of 4350 g becomes 1 g/10 mins or more, and said layer having high adhesion to the polyester elastomer cover.
Claim 2
Dependent Claim
87 words
A golf ball comprising a thread-wound central core, an outer cover for the core, said cover being formed of a polyester elastomer and a layer of thermoplastic resin disposed between said cover and said core, said layer having a substantial melt flow initiation temperature of 160° C. or less, said substantial melt flow initiation temperature being the minimum temperature at which the melt index under a load of 4350 g becomes 1 g/10 mins or more, and said layer having high adhesion to the polyester elastomer cover.
Claim 3
Dependent Claim
25 words
A golf ball as claimed in claim 1, wherein said polyester elastomer has a stress at 10% elongation of 10 through 200 kg/cm 2 .
Claim 4
Dependent Claim
19 words
A golf ball as claimed in claim 1, wherein said polyester elastomer has a resilience of 30% or more.
Claim 5
Dependent Claim
24 words
A golf ball as claimed in claim 1, wherein said polyester elastomer has a substantial melt flow initiation temperature of 190° C. or less.
Claim 6
Dependent Claim
25 words
A golf ball as claimed in claim 1, wherein said thermoplastic resin has a stress at 10% elongation of 10 through 200 kg/cm 2 .
Claim 7
Dependent Claim
19 words
A golf ball as claimed in claim 1, wherein said thermoplastic resin has a resilience of 30% or more.
Claim 8
Dependent Claim
26 words
A golf ball as claimed in claim 1, wherein the thickness of the intermediate thermoplastic resin layer is within the range of 0.1 to 1.0 mm.
References Cited (Backward Citations)
US3454280A
Cited
US3940146A
Cited
US3784520A
Cited
US3819768A
Cited
US4185831A
Cited
US4272079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |