Patent US4532748A successfully refreshed from Google Patents.
US4532748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building block
Assignee: Individual
•
Filing: 1983-01-03
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Granted: 1985-08-06
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Expires: 2003-01-03
Abstract
Abstract The invention provides a building block having a shape derived from that of a cuboid, wherein the upper corners of the front face (1) are cut-away and a recess communicates between the bottom face (2) and the rear face (3). Preferably, the sum of the depth to which the said corners are cut away backwards from the front face and the depth to which the recess extends forward from the back face is greater than the depth of the block. Thus, when the blocks are built into a wall in the conventional manner louvres are formed by the recess of one block and the adjacent cut-away portions of two blocks below. The cut-away portions at the corners may be tetrahedral or half segments of a circle or ellipse, for example. The recesses may be tetrahedral or segments of a circle or ellipse.
Inventors
- 👤 William D. B. Rotherham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:40
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/12; E04B2002/0202; E04B2002/0204; E04B2002/0213; Y; Y10; Y10S; Y10S52/00; Y10S52/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
118 words
A building block having a shape derived from that of a cuboid and having top, bottom, front and rear faces and upper and lower corners, wherein the upper corners of the front face of the cuboid are cut away, part of the top face being left intact, and wherein a recess communicates between the bottom face and the rear face only, part of the bottom face and the lower corners of the rear face being left intact, the sum of the depth to which said upper corners are cut as measured from said front face and the depth to which the recess extends forwardly as measured from the rear face being greater than the depth of the cuboid.
Claim 2
Dependent Claim
118 words
A building block having a shape derived from that of a cuboid and having top, bottom, front and rear faces and upper and lower corners, wherein the upper corners of the front face of the cuboid are cut away, part of the top face being left intact, and wherein a recess communicates between the bottom face and the rear face only, part of the bottom face and the lower corners of the rear face being left intact, the sum of the depth to which said upper corners are cut as measured from said front face and the depth to which the recess extends forwardly as measured from the rear face being greater than the depth of the cuboid.
Claim 3
Dependent Claim
21 words
A block according to claim 1, wherein the recess is located substantially centrally of the rear bottom edge of the block.
Claim 4
Dependent Claim
39 words
A block according to claim 1, wherein the corners are cut away such that the shape formed by the adjacent cut away portions at the corners of two blocks placed side by side corresponds to that of the recess.
Claim 5
Dependent Claim
18 words
A block according to claim 1, wherein the cut-away portions at the corners and the recess are tetrahedral.
Claim 6
Dependent Claim
40 words
A block according to claim 1, wherein the cut-away portions at the corner are rectangular in front and top view but triangular in end view, and the recess is rectangular in rear and bottom view but triangular in end view.
Claim 7
Dependent Claim
32 words
A block according to claim 1, wherein the cut-away portions at the corners are half segments of a sphere or ellipse and the recess is a segment of a sphere or ellipse.
Claim 8
Dependent Claim
32 words
A block according to claim 1, wherein the cut-away portions at the corners are half segments of a cylindroid or cylinder and the recess is a segment of a cylindroid or cylinder.
Claim 9
Dependent Claim
55 words
A block according to claim 1, wherein the cut-away portions at the corners are pentahedral, extending from a rectangular shape in the top face to a triangular shape in the front face, and the recess is also pentahedral, extending from a rectangular shape in the bottom face to a triangular shape in the rear face.
Claim 10
Dependent Claim
25 words
A block according to claim 1, wherein the cut-away portions extend sufficiently to cut off the lower corners of the front face of the block.
Claim 11
Dependent Claim
13 words
A wall constructed from a plurality of the blocks according to claim 1.
Claim 12
Dependent Claim
39 words
A kit of parts comprising a plurality of blocks according to claim 1 and a plurality of end or corner blocks being in the form of a cuboid having one upper corner of the front face thereof cut away.
Claim 13
Dependent Claim
30 words
A kit of parts according to claim 11 wherein at least some of some of the end or corner blocks have a recess communicating between bottom and rear faces thereof.
Claim 14
Dependent Claim
27 words
A kit of parts according to claim 12, further comprising end blocks in the form of a cuboid being half of the cuboid of the building blocks.
Claim 15
Dependent Claim
23 words
A kit of parts according to claim 13, wherein one corner of at least some of the cuboid half blocks is cut away.
Claim 16
Dependent Claim
26 words
A kit of parts according to claim 13 wherein a hole extends through at least some of the end or corner blocks between two opposite faces.
Claim 17
Dependent Claim
20 words
A block according to claim 1, in which the lower corners of the rear face provide a bottom bearing surface.
References Cited (Backward Citations)
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |