US4570937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two piece solid golf ball
Assignee: Sumitomo Rubber Industries Ltd
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Filing: 1983-09-13
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Granted: 1986-02-18
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Expires: 2003-09-13
Abstract
Abstract A two piece solid golf ball having a high impact resilience and an excellent durability, comprising a solid core and a cover, said solid core having a particular hardness distribution such that the hardnesses measured by a JIS-C hardness tester are from 72 to 78 at the surface, from 77 to 83 at the position "A", 5 mm. apart from the surface, from 72 to 80 at the position "B", 10 mm. apart from the surface, from 67 to 75 at the position "C", 15 mm. apart from the surface, and not more than 75 at the residual center portion.
Inventors
- 👤 Mikio Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:44
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/0003; A63B37/005; A63B37/006; A63B37/0062; A63B37/0063; A63B37/0064; A63B37/007; A63B37/0072; A63B37/0074; A63B37/0077; A63B37/008; A63B37/0083; A63B37/0084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A two piece solid golf ball comprising a solid core and a cover for covering the solid core, said solid core having a distribution of hardness such that the hardnesses measured by a JIS-C hardness tester are from 72 to 78 at the surface, from 77 to 83 at the position 5 mm. apart from the surface, from 72 to 80 at the position 10 mm. apart from the surface, from 67 to 75 at the position 15 mm. apart from the surface, and not more than 75 at the residual center portion.
Claim 2
Dependent Claim
93 words
A two piece solid golf ball comprising a solid core and a cover for covering the solid core, said solid core having a distribution of hardness such that the hardnesses measured by a JIS-C hardness tester are from 72 to 78 at the surface, from 77 to 83 at the position 5 mm. apart from the surface, from 72 to 80 at the position 10 mm. apart from the surface, from 67 to 75 at the position 15 mm. apart from the surface, and not more than 75 at the residual center portion.
Claim 3
Dependent Claim
13 words
The golf ball of claim 1, wherein said cover comprises an ionomer resin.
Claim 4
Dependent Claim
19 words
The golf ball of claim 1, wherein said solid core is made of a rubber composition comprising cis-1,4-butadiene rubber.
References Cited (Backward Citations)
GB1177226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |