US4185939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground covering slab
Assignee: F von Langsdorff Licensing Ltd
•
Filing: 1978-07-11
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Granted: 1980-01-29
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Expires: 1998-07-11
Abstract
Abstract A ground covering slab is subdivided into neighboring preformed individual stones interconnected along rupture zones of which at least parts extend non-rectilinearly from one edge of the slab to the opposite edge of the slab as seen in plan view and the preformed individual stones are of at least two kinds differing in size distributed throughout the slab.
Inventors
- 👤 Gunter Barth
- 👤 Fritz VON Langsdorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/06; E01C2201/00; E01C2201/02; E01C2201/16; E01C2201/162
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A ground covering slab comprising first and second kinds of adjacent spaced, individual stones arranged in a pattern having first and second longitudinal edges, said first and second kinds of stones having first and second surface areas respectively; and first and second types of connecting elements located within the spaces between adjacent stones and interconnecting said stones to each other, the strength of said first type of connecting elements being greater than that of said second type of connecting elements, said connecting elements forming elongated rupture zones extending non-rectilinearly between said first and second longitudinal edges thereby stiffening said slab.
Claim 2
Dependent Claim
100 words
A ground covering slab comprising first and second kinds of adjacent spaced, individual stones arranged in a pattern having first and second longitudinal edges, said first and second kinds of stones having first and second surface areas respectively; and first and second types of connecting elements located within the spaces between adjacent stones and interconnecting said stones to each other, the strength of said first type of connecting elements being greater than that of said second type of connecting elements, said connecting elements forming elongated rupture zones extending non-rectilinearly between said first and second longitudinal edges thereby stiffening said slab.
Claim 3
Dependent Claim
30 words
A ground covering slab as claimed in claim 1 wherein at least a portion of said connecting elements terminates below a plane that contains the top surface of said slab.
Claim 4
Dependent Claim
19 words
A ground covering slab as claimed in claim 2 wherein all of said connecting elements terminate below said plane.
Claim 5
Dependent Claim
28 words
A ground covering slab as claimed in claim 1 wherein each of said stones is connected to each neighboring stone by a single one of said connecting elements.
Claim 6
Dependent Claim
59 words
A ground covering slab as claimed in claim 1 wherein first and second pluralities of said stones are joined to form first and second groups of stones, respectively, the connecting elements between the stones of each group being of said first type and the connecting elements between said first and second groups of stones being of said second type.
Claim 7
Dependent Claim
33 words
A ground covering slab as claimed in claim 5 wherein each of said first and second groups of stones comprises a stone of said first kind and a stone of said second kind.
Claim 8
Dependent Claim
38 words
A ground covering slab as claimed in claim 5 wherein each of said first type of connecting elements has a cross-sectional area which is more than half the areas of the sides of the stones being connected thereby.
Claim 9
Dependent Claim
28 words
A ground covering slab as claimed in claim 1 wherein said first and second kinds of stones have surface areas which are octagonal and square in shape, respectively.
Claim 10
Dependent Claim
44 words
A ground covering slab as claimed in claim 1 wherein each of said stones is connected to one adjacent stone by a connecting element of said first type, said stone being connected to all other adjacent stones by connecting elements of said second type.
Claim 11
Dependent Claim
25 words
A ground covering slab as claimed in claim 1 wherein each stone of said first kind is connected only to stones of said second kind.
Claim 12
Dependent Claim
30 words
A ground covering slab as claimed in claim 1 wherein a plurality of said connecting elements are spaced apart and form a row and said row forms a rupture zones.
Claim 13
Dependent Claim
26 words
A ground covering slab as claimed in claim 1 wherein said first and second types of connecting elements are of at least two different dimensions respectively.
Claim 14
Dependent Claim
36 words
A ground covering slab according to claim 1 which includes stones that have corners as seen in plan view and gaps at said corners which extend from the top surface of said slab to its underside.
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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |