US4787638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Maruman Golf Co Ltd
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Filing: 1987-01-30
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Granted: 1988-11-29
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Expires: 2007-01-30
Abstract
Abstract A golf ball comprises a body having a spherical outer surface and a plurality of first dimples arranged substantially uniformly in the spherical outer surface thereof. The body also has a plurality of indentations which are smaller than the first dimples and arranged substantially uniformly in the spherical outer surface and the inside surface of the first dimples. The indentations may be formed by grit blasting.
Inventors
- 👤 Masashi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:34
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0004; A63B37/0012; A63B37/007; A63B37/0077; A63B37/0089
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A golf ball, comprising: a body having a generally spherical outer surface; a plurality of dimples disposed substantially uniformly on said spherical outer surface; and a plurality of indentations, smaller than said dimples, formed in each dimple and on the spherical outer surface.
Claim 2
Dependent Claim
43 words
A golf ball, comprising: a body having a generally spherical outer surface; a plurality of dimples disposed substantially uniformly on said spherical outer surface; and a plurality of indentations, smaller than said dimples, formed in each dimple and on the spherical outer surface.
Claim 3
Dependent Claim
28 words
The golf ball of claim 1, wherein said indentations in said dimples and on said spherical outer surface have structural characteristics corresponding to indentations formed by grit blasting.
Claim 4
Dependent Claim
15 words
The golf ball of claim 1, wherein each of said dimples has a hemispherical wall.
Claim 5
Dependent Claim
15 words
The golf ball of claim 3, wherein each of said indentations has a hemispherical wall.
Claim 6
Dependent Claim
15 words
The golf ball of claim 1, wherein each of said indentations has a hemispherical wall.
Claim 7
Dependent Claim
37 words
The golf ball of claim 1, wherein the parameters of said indentations are such that said indentations actively generate small vortices of air on each dimple and on said spherical outer surface during flight of the ball.
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |