US4911451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball cover of neutralized poly(ethylene-acrylic acid) copolymer
Assignee: Spalding and Evenflo Companies Inc
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Filing: 1989-03-29
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Granted: 1990-03-27
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Expires: 2009-03-29
Abstract
Abstract An improved golf ball comprising a core and a cover therefor, said cover comprises singularly or blends of a zinc neutralized ethylene-acrylic acid copolymer and a sodium neutralized ethylene-acrylic acid copolymer, or a blend of two or more zinc-neutralized ethylene-acrylic acid copolymers and a sodium-neutralized ethylene acrylic acid copolymer.
Inventors
- 👤 Michael J. Sullivan
- 👤 Terence Melvin
- 👤 R. Dennis Nesbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/0024; A63B37/007; A63B37/0072; A63B37/0074; C08L33/00; C08L33/02; Y; Y10; Y10S; Y10S273/00; Y10S273/22; Y10S524/00; Y10S524/908
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
A golf ball comprising a core and a cover, wherein said cover comprises a blend of from about 10% to about 90% by weight of an ethylene-acrylic acid copolymer which is neutralized with a sodium ion, and about 90% to 10% by weight of an ethylene-acrylic acid copolymer which is neutralized with a zinc ion.
Claim 2
Dependent Claim
55 words
A golf ball comprising a core and a cover, wherein said cover comprises a blend of from about 10% to about 90% by weight of an ethylene-acrylic acid copolymer which is neutralized with a sodium ion, and about 90% to 10% by weight of an ethylene-acrylic acid copolymer which is neutralized with a zinc ion.
Claim 3
Dependent Claim
45 words
The golf ball as defined by claim 1 wherein said cover comprises from about 25% to about 75% by weight of said metal ion neutralized ethylene-acrylic acid copolymer and from about 75% to about 25% by weight of said zinc ion neutralized ethylene-acrylic acid copolymer.
Claim 4
Dependent Claim
100 words
A golf ball comprising a core and a cover, wherein said cover comprises a blend of from about 10% to about 90% by weight of an ethylene-acrylic acid copolymer containing about 11% by weight acrylic acid having about 40% of the carboxylic acid groups neutralized with sodium ions, and from about 90% to about 10% by weight of at least one ethylene-acrylic acid copolymer containing from about 11% to about 16% by weight acrylic acid with from about 10% to about 40% of the carboxylic acid groups neutralized by zinc ions and about 2.4% by weight of additives compatible therewith.
Claim 5
Dependent Claim
100 words
A golf ball comprising a core and a cover, wherein said cover comprises a blend of from about 10% to about 90% by weight of an ethylene-acrylic acid copolymer containing about 11% by weight acrylic acid having about 40% of the carboxylic acid groups neutralized with sodium ions, and from about 90% to about 10% by weight of at least one ethylene-acrylic acid copolymer containing from about 11% to about 16% by weight acrylic acid with from about 10% to about 40% of the carboxylic acid groups neutralized by zinc ions and about 2.4% by weight of additives compatible therewith.
Claim 6
Dependent Claim
39 words
A golf ball as defined by claim 3 wherein said cover comprises from about 25% to about 75% by weight of said sodium-neutralized ethylene-acrylic acid copolymer and from about 75% to about 25% by weight zinc-neutralized ethylene-acrylic acid copolymer.
Claim 7
Dependent Claim
30 words
A golf ball as defined by claim 3 wherein said cover comprises about 45.2% by weight of sodium-neutralized ethylene-acrylic acid copolymer and about 52.4% by weight zinc-neutralized ethylene-acrylic acid copolymer.
Claim 8
Dependent Claim
24 words
A golf ball as defined in claim 3 wherein the zinc-neutralized copolymer component of said blend is a mixture of zinc-neutralized ethylene-acrylic acid copolymers.
Claim 9
Dependent Claim
22 words
The golf ball of claim 1 wherein said cover comprises a mixture of one or more pigments, an optical brightener, and/or dye.
Claim 10
Dependent Claim
22 words
The golf ball of claim 3 wherein said additives comprise a mixture of one or more pigments, an optical brightener, and/or dye.
Claim 11
Dependent Claim
21 words
The golf ball of claim 1 wherein the cover further incorporates an ionomer which is a partially neutralized ethylene-methacrylic acid copolymer.
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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |