US4345761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrahedral gaming die with recessed pyramidal faces
Assignee: BERMAS PLASTICS CO Inc
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Filing: 1981-07-06
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Granted: 1982-08-24
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Expires: 2001-07-06
Abstract
Abstract A new gaming die is an equilateral tetrahedron with each of its four sides in the form of a recessed triangular pyramid. The resulting twelve congruent triangular facets of the novel die may carry numerals, letters or other characters depending on the game for which the die or dice are designed. A unique feature of the tetrahedral die is that it can be cheaply produced by the injection molding of a thermoplastic.
Inventors
- 👤 David B. China
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:36
CPC Classifications
A; A63; A63F; A63F9/00; A63F9/04; A63F9/0415; A63F2009/0422; A63F3/00; A63F3/04; A63F3/0423; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A novel gaming die which is in the form of an equilateral tetrahedron, characterized in that each of the four sides has the same form of a recessed triangular pyramid having three congruent facets, and the twelve congruent facets bear various markings for scoring purposes.
Claim 2
Dependent Claim
45 words
A novel gaming die which is in the form of an equilateral tetrahedron, characterized in that each of the four sides has the same form of a recessed triangular pyramid having three congruent facets, and the twelve congruent facets bear various markings for scoring purposes.
Claim 3
Dependent Claim
23 words
The gaming die of claim 1 wherein the inner apexes of the four recessed triangular pyramids are near the center of the tetrahedron.
Claim 4
Dependent Claim
16 words
The gaming die of claim 2 wherein the edges and apexes of the tetrahedron are rounded.
Claim 5
Dependent Claim
16 words
The gaming die of claim 3 which is produced by the injection molding of a thermoplastic.
Claim 6
Dependent Claim
20 words
The gaming die of claim 4 wherein the thermoplastic is selected from the group consisting of polyethylene, polypropylene and polystyrene.
Claim 7
Dependent Claim
25 words
The gaming die of claim 1 wherein the length of each edge of the tetrahedron is in the range of about 0.5 to 1.5 inches.
Claim 8
Dependent Claim
16 words
The gaming die of claim 1 wherein the edges and apexes of the tetrahedron are rounded.
Claim 9
Dependent Claim
16 words
The gaming die of claim 1 which is produced by the injection molding of a thermoplastic.
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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |