US3964749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pentomino puzzles
Assignee: Individual
•
Filing: 1970-04-10
•
Granted: 1976-06-22
•
Expires: 1990-04-10
Abstract
Abstract A board having four rectangles of 90 squares dimensioned respectively 9 × 10, 6 × 15, 5 × 18 and 3 × 30. At least one set of the 18 one-sided pentominoes are provided for disposition in the aforesaid rectangles. In one embodiment a number on one side of each pentominoe piece is related to the difficulty of playing the piece. In another embodiment, two sets of pentominoes are provided with opposite checkerboard patterns. In other embodiments, the pentominoes are provided with parts of a message, picture or geometric design.
Inventors
- 👤 William Kent Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:16
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/04; A63F9/00; A63F9/06; A63F9/10; G; G09; G09B; G09B1/00; G09B1/02; G09B1/04; G09B1/06; A63F2250/00; A63F2250/22; A63F9/1044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
Two distinguishable sets of pentomino pieces, each set comprising 18 one-sided pentominoes, each pentomino in the set being different from all the other pentominoes in the set and having on one side alternate squares of different appearances capable of being arranged in a rectangle of 3 × 30 squares in a perfect checkerboard pattern, in which said pieces of each set are capable of being arranged in the same relation to each other in a rectangle of 3 × 30 squares in perfect but opposite checkerboard patterns.
Claim 2
Dependent Claim
87 words
Two distinguishable sets of pentomino pieces, each set comprising 18 one-sided pentominoes, each pentomino in the set being different from all the other pentominoes in the set and having on one side alternate squares of different appearances capable of being arranged in a rectangle of 3 × 30 squares in a perfect checkerboard pattern, in which said pieces of each set are capable of being arranged in the same relation to each other in a rectangle of 3 × 30 squares in perfect but opposite checkerboard patterns.
References Cited (Backward Citations)
US1290761A
Cited
FR641430A
Cited
GB403691A
Cited
GB490302A
Cited
US2235615A
Cited
US2825568A
Cited
US3171214A
Cited
FR1483774A
Cited
US3402934A
Cited
US3558136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |