Patent US4162074A successfully refreshed from Google Patents.
US4162074A
Expired / Lapsed
US
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Golf putter
Assignee: Individual
•
Filing: 1977-01-21
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Granted: 1979-07-24
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Expires: 1997-01-21
Abstract
Abstract A golf putter has on its face a convex, parabolic protruding portion extending horizontally along the face at a height such as to strike a golf ball slightly below its center. The convex protuberance provides only a very slight lift to the ball and imparts a substantial amount of overspin.
Inventors
- 👤 William B. Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:28
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0487; A63B53/0408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
In a golf putter having a shaft and a head, an improved face on one side of the head for stroking a golf ball, comprising: an elongate face surface; an elongate convex striking surface protruding forwardly from said face surface, and extending generally horizontal therealong; the extreme forward apex portion of said convex striking surface being disposed only slightly below the center of a standard size golf ball when the ball and head are resting on a typical putting surface on which the club is designed to be used and also when the putter head is held slightly above the putting surface; and said convex surface having a generally arcuate portion of about 0.7 inches radius at said apex and transitioning to an upper surface generally tangent to said arcuate surface and disposed at about 3° to the vertical.
Claim 2
Dependent Claim
139 words
In a golf putter having a shaft and a head, an improved face on one side of the head for stroking a golf ball, comprising: an elongate face surface; an elongate convex striking surface protruding forwardly from said face surface, and extending generally horizontal therealong; the extreme forward apex portion of said convex striking surface being disposed only slightly below the center of a standard size golf ball when the ball and head are resting on a typical putting surface on which the club is designed to be used and also when the putter head is held slightly above the putting surface; and said convex surface having a generally arcuate portion of about 0.7 inches radius at said apex and transitioning to an upper surface generally tangent to said arcuate surface and disposed at about 3° to the vertical.
Claim 3
Dependent Claim
21 words
A golf putter in accordance with claim 1 wherein said upper surface is slightly rounded to a very flat parabolic shape.
Claim 4
Dependent Claim
27 words
A golf putter in accordance with claim 1 wherein the dimension from the bottom surface of the head to the axis of curvature is about 0.6 inches.
Claim 5
Dependent Claim
30 words
A golf putter in accordance with claim 1 wherein the axis of curvature is located about 0.10 inches below the center of the ball when putting with a normal stroke.
Claim 6
Dependent Claim
41 words
A golf putter in accordance with claim 1 wherein said face portion below said striking surface is a generally planar surface, generally tangent to the arc of said striking surface, and disposed at an angle of about 2° to the vertical.
Claim 7
Dependent Claim
23 words
A golf putter in accordance with claim 1 wherein said convex striking surface extends substantially across the entire length of the putter face.
References Cited (Backward Citations)
GB191227807A
Cited
GB637948A
Cited
US2665909A
Cited
US3989256A
Cited
US3989257A
Cited
US4077633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |