Patent US2500812A successfully refreshed from Google Patents.
Patent US3680868A successfully refreshed from Google Patents.
US3680868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf putter with rotatable sole device mounted thereon
Assignee: Day International Corp
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Filing: 1970-12-18
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Granted: 1972-08-01
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Expires: 1990-12-18
Abstract
Abstract A golf putter with at least one rotatable spherical device mounted in the bottom of the putting head to reduce friction between the head and the putting surface during the putting stroke. A variation of the putter permits the device to be removed from the club and replaced by another one having different characteristics.
Inventors
- 👤 Richard J Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:06
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0487; A63B53/0433; A63B60/00; A63B60/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A golf putter for use on a golfing surface comprising a handle and a putting head; said putting head having a putting face, toe and heel portions, and a bottom surface; a slot located in said head extending parallel to said putting face from said toe portion toward said heel portion and opening into said bottom surface; and further comprising an assembly having a housing member and at least one freely rotatable spherical device mounted therein; said assembly slidably and securely mounted within said slot; said device contacting the golfing surface during putting action to reduce friction therewith.
Claim 2
Dependent Claim
98 words
A golf putter for use on a golfing surface comprising a handle and a putting head; said putting head having a putting face, toe and heel portions, and a bottom surface; a slot located in said head extending parallel to said putting face from said toe portion toward said heel portion and opening into said bottom surface; and further comprising an assembly having a housing member and at least one freely rotatable spherical device mounted therein; said assembly slidably and securely mounted within said slot; said device contacting the golfing surface during putting action to reduce friction therewith.
Claim 3
Dependent Claim
32 words
The putter of claim 1 in which said putting head includes a pair of shoulders defining said slot on the bottom surface of said head, said assembly being supported on said shoulders.
Claim 4
Dependent Claim
24 words
The putter of claim 1 having at least two spaced devices aligned along an axis parallel to said putting face and said bottom surface.
Claim 5
Dependent Claim
18 words
The putter of claim 1 having only a single device centrally mounted with respect to the bottom surface.
Claim 6
Dependent Claim
14 words
The putter of claim 1 in which said putting head is made of plastic.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |