Patent US4133527A successfully refreshed from Google Patents.
US4133527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bowling balls
Assignee: AMF BOWLING PRODUCTS Inc A VIRGINIA Corp
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Filing: 1977-01-21
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Granted: 1979-01-09
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Expires: 1997-01-21
Abstract
Abstract Soft rubber buffing dust is dispersed throughout the hard rubber cover of a bowling ball. When polished, cavities are formed in the cover, resulting in increased traction or grip between the bowling ball and bowling lane surface.
Inventors
- 👤 Floyd L. Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:24
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/0001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
In a hard rubber bowling ball, comprising a hard core and a surrounding hard rubber approximately 1/4 inch thick outer cover, the improvement of minute cavities distributed solely throughout said cover, including its outer surface, to give increased traction between the ball and a bowling lane surface, wherein said cavities at said outer surface are empty, and said cavities in the rest of the cover being filled with particles of rubber which are softer in hardness than that of the cover.
Claim 2
Dependent Claim
81 words
In a hard rubber bowling ball, comprising a hard core and a surrounding hard rubber approximately 1/4 inch thick outer cover, the improvement of minute cavities distributed solely throughout said cover, including its outer surface, to give increased traction between the ball and a bowling lane surface, wherein said cavities at said outer surface are empty, and said cavities in the rest of the cover being filled with particles of rubber which are softer in hardness than that of the cover.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |