US4082356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational puzzle chair
Assignee: Individual
•
Filing: 1977-02-25
•
Granted: 1978-04-04
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Expires: 1997-02-25
Abstract
Abstract An educational puzzle chair for children between the ages of 18 months and 5 years of age. The chair includes two identical sides, a brace, two identical wedges, a back and a step. The chair is assembled by interlocking its parts in a predetermined manner and order without the use of any fastening elements or tools. All pieces except the sides are reversible. The components of the chair can be stored in a minimum amount of space and can be placed in a small container for easy carrying. The chair is durable and economical to produce.
Inventors
- 👤 Karin Ruth Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:50
CPC Classifications
A; A47; A47C; A47C4/00; A47C4/02; A47C4/021; A47C4/03; A47D; A47D1/00; A47D1/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
An educational puzzle chair, comprising the combination of two substantially square sides, a brace, two wedges, a seat, a back, and a step; the sides each have rounded corners and four slots, a lower vertical slot, a long horizontal slot, an upper vertical slot, and a short horizontal slot; the lower vertical slot is adapted to interlockingly engage one end of the brace, the long horizontal slot is adapted to interlockingly engage a vertical slot of the seat, the upper vertical slot is adapted to interlockingly engage a vertical slot of the back, and the short horizontal slot is adapted to interlockingly engage a vertical slot of the step; the wedges are adapted to interlockingly engage in two slots of the brace; all of the components are of such a size that they can be handled by pre-school children.
Claim 2
Dependent Claim
139 words
An educational puzzle chair, comprising the combination of two substantially square sides, a brace, two wedges, a seat, a back, and a step; the sides each have rounded corners and four slots, a lower vertical slot, a long horizontal slot, an upper vertical slot, and a short horizontal slot; the lower vertical slot is adapted to interlockingly engage one end of the brace, the long horizontal slot is adapted to interlockingly engage a vertical slot of the seat, the upper vertical slot is adapted to interlockingly engage a vertical slot of the back, and the short horizontal slot is adapted to interlockingly engage a vertical slot of the step; the wedges are adapted to interlockingly engage in two slots of the brace; all of the components are of such a size that they can be handled by pre-school children.
Claim 3
Dependent Claim
31 words
The educational puzzle chair of claim 1, wherein the brace is a rectangle with rounded slotted tongues on its ends and the wedges are adapted to fit within said slotted tongues.
Claim 4
Dependent Claim
36 words
The knockdown chair of claim 2, wherein the seat is a rectangle with forward projecting bifurcated arms on its front edge, two vertical slots are located adjacent to the front edge and arms of the seat.
Claim 5
Dependent Claim
31 words
The knockdown chair of claim 3, wherein the back is a rectangle with two spaced fingers, two vertical slots are located adjacent to the front edge and fingers of the back.
Claim 6
Dependent Claim
27 words
The knockdown chair of claim 4, wherein the step is a rectangle with rounded edges on one edge and two spaced vertical slots on the other edge.
Claim 7
Dependent Claim
22 words
The educational puzzle chair of claim 5, wherein the seating area is of a size that will comfortably seat a pre-school child.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |