US4367873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Game ball
Assignee: Individual
•
Filing: 1981-06-30
•
Granted: 1983-01-11
•
Expires: 2001-06-30
Abstract
Abstract A game ball for use in playing such games as baseball or softball comprises a spherical core made of PVC foam, a core cover of an ethylene copolymer, the core cover having a corrugated or rough surface, yarn windings and an outer leather cover, the ball having lower production cost and good durability in addition to essentially the same playing characteristics as conventional balls.
Inventors
- 👤 Paul P. H. Chang
- 👤 Chen-Shin Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/02; A63B37/06; Y; Y10; Y10S; Y10S273/00; Y10S273/04; Y10S273/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A game ball for use in playing such games as baseball or softball comprising a spherical core, a core cover, yarn windings and an outer leather cover to have essentially the same playing characteristics as conventional balls, the improvements which comprise: (a) a spherical core made of polyvinyl chloride foam coated with a core cover made of ethylene copolymer; and (b) corrugations and rough patterns being formed on the outer surface of said core cover.
Claim 2
Dependent Claim
75 words
A game ball for use in playing such games as baseball or softball comprising a spherical core, a core cover, yarn windings and an outer leather cover to have essentially the same playing characteristics as conventional balls, the improvements which comprise: (a) a spherical core made of polyvinyl chloride foam coated with a core cover made of ethylene copolymer; and (b) corrugations and rough patterns being formed on the outer surface of said core cover.
Claim 3
Dependent Claim
19 words
A game ball according to claim 1 wherein said ethylene copolymer is a copolymer of ethylene with ethyl acrylate.
Claim 4
Dependent Claim
30 words
A game ball according to claim 1 wherein said core cover has a thickness ranging from about one eighth inches to half an inch and preferably being half an inch.
Claim 5
Dependent Claim
36 words
A game ball according to claim 1 wherein the extension height or width of said corrugations or rough patterns of said core ranges from about one sixteenth of an inch to one eighth of an inch.
Claim 6
Dependent Claim
30 words
A game ball according to claim 1 wherein the extension height or width of said corrugations or rough patterns of said core cover is about one sixteenth of an inch.
References Cited (Backward Citations)
US1558706A
Cited
GB649217A
Cited
US2787024A
Cited
US2938237A
Cited
US3940145A
Cited
US3908993A
Cited
US3976295A
Cited
US3976295B1
Cited
US4149720A
Cited
US4211407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |