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US4077153A
Expired / Lapsed
US
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Child's play block with card-retaining tangs
Assignee: KLUSAN Inc
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Filing: 1973-07-19
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Granted: 1978-03-07
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Expires: 1993-07-19
Abstract
Abstract A child's play block having a continuous periphery of material width with a central strengthening web and card retaining tangs adjacent thereto for the reception of picture card inserts which are color coded to the color of the block.
Inventors
- 👤 George W. Dunbar
- 👤 Jerrold J. Krumholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:04
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A play building block of such dimensions as to be readily picked up by a young child's hand comprising a unitary member having the shape of joined, oppositely disposed boxes of similar size and depth and having a common bottom, corresponding sides and open tops, the corresponding sides of said joined boxes forming substantially continuous planar surfaces, the bottom, sides and the top of each box defining the interior of that box therebetween, said block having tangs rigidly mounted on the interior surfaces of opposed sides of at least one of said boxes and just spaced from the bottom thereof to retain a pictorial insert card against said bottom.
Claim 2
Dependent Claim
109 words
A play building block of such dimensions as to be readily picked up by a young child's hand comprising a unitary member having the shape of joined, oppositely disposed boxes of similar size and depth and having a common bottom, corresponding sides and open tops, the corresponding sides of said joined boxes forming substantially continuous planar surfaces, the bottom, sides and the top of each box defining the interior of that box therebetween, said block having tangs rigidly mounted on the interior surfaces of opposed sides of at least one of said boxes and just spaced from the bottom thereof to retain a pictorial insert card against said bottom.
Claim 3
Dependent Claim
117 words
A play building block of such dimensions as to be readily picked up by a young child's hands comprising a unitary member having the shape of joined, oppositely disposed boxes of similar size and depth and having a common bottom, corresponding sides and open tops, the corresponding sides of said joined boxes forming substantially continuous planar surfaces, the bottom, sides and the top of each box defining the interior of that box therebetween, said boxes being triangular and having a tang rigidly mounted on the interior surface of at least one of the sides of at least one of said boxes and just spaced from the bottom thereof to retain a pictorial insert card against said bottom.
Claim 4
Dependent Claim
117 words
A play building block of such dimensions as to be readily picked up by a young child's hands comprising a unitary member having the shape of joined, oppositely disposed boxes of similar size and depth and having a common bottom, corresponding sides and open tops, the corresponding sides of said joined boxes forming substantially continuous planar surfaces, the bottom, sides and the top of each box defining the interior of that box therebetween, said boxes being triangular and having a tang rigidly mounted on the interior surface of at least one of the sides of at least one of said boxes and just spaced from the bottom thereof to retain a pictorial insert card against said bottom.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |