US5040793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic air-filled ball
Assignee: Cheng Gen Plastic Co Ltd
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Filing: 1990-07-25
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Granted: 1991-08-20
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Expires: 2010-07-25
Abstract
Abstract Plastic air-filled balls comprising three identical layer pieces of plastic connected together. In the middle layer, a thru-hold is provided to balance air pressure and on either one of the other layers an air valve and plug are disposed to confine air in said ball.
Inventors
- 👤 Cheng-Yuan Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
A; A63; A63B; A63B41/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
36 words
A air-filled ball composed of a body comprising: upper, middle, and lower layers; wherein said middle layer is provided with an air passage and either one of the other layers is provided with an air valve.
Claim 2
Dependent Claim
36 words
A air-filled ball composed of a body comprising: upper, middle, and lower layers; wherein said middle layer is provided with an air passage and either one of the other layers is provided with an air valve.
Claim 3
Dependent Claim
21 words
The air-filled ball of claim 1, wherein said body is of any geometrical shape and said layers are of identical shape.
References Cited (Backward Citations)
US1531317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |