Patent US4223890A successfully refreshed from Google Patents.
US4223890A
Expired / Lapsed
US
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Set of tiles for covering a surface
Assignee: Individual
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Filing: 1979-04-30
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Granted: 1980-09-23
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Expires: 1999-04-30
Abstract
Abstract A set of tiles for covering a regular polygon having an even number of sides is composed of tiles each of which is distinct from the other tiles in the set. The tiles in the set may be combined so as to form the regular polygon in a number of ways which increases very rapidly with increasing numbers of sides. The tiles of the invention may be used as a recreational puzzle, as a game, as an educational tool, for aesthetic purposes, and for a variety of other uses.
Inventors
- 👤 Alan H. Schoen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:43
CPC Classifications
B; B44; B44C; B44C3/00; B44C3/12; B44C3/123; A; A63; A63F; A63F9/00; A63F9/06; A63F9/10; B44F; B44F3/00; A63F9/0669; A63F2009/0695; A63F2009/0697; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/168
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A set of tiles for covering a plane surface bounded by a regular polygon of 2n sides, for forming a repeatable cell, and for other purposes, said regular polygon being dissectible into a set of (n-1)n/2 rhombuses, comprising one specimen of each distinct rhombus in said set and one specimen of each distinct shape formed by combining two of the remaining rhombuses in said set in such a manner that no two edges at any vertex are collinear.
Claim 2
Dependent Claim
78 words
A set of tiles for covering a plane surface bounded by a regular polygon of 2n sides, for forming a repeatable cell, and for other purposes, said regular polygon being dissectible into a set of (n-1)n/2 rhombuses, comprising one specimen of each distinct rhombus in said set and one specimen of each distinct shape formed by combining two of the remaining rhombuses in said set in such a manner that no two edges at any vertex are collinear.
Claim 3
Dependent Claim
70 words
A set of tiles according to claim 1, wherein the number of sides 2n=4q, wherein the smaller angle of each said rhombus is an integral multiple of 360°/2n wherein the integer is not greater than q, and wherein said set of rhombuses includes q squares and 2q of each of the other (q-1) species of rhombus, so that the total number of tiles in the set is q 2 .
Claim 4
Dependent Claim
61 words
A set of tiles according to claim 1, wherein the number of sides 2n=4(q+1/2), wherein the smaller angle of each said rhombus is an integral multiple of 360°/2n wherein the integer is not greater than q, and wherein said set of rhombuses includes 2q+1 of each species of rhombus, so that the total number of tiles in the set is q(q+1).
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |