US3702520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable construction block
Assignee: National Aeronautics and Space Administration
•
Filing: 1971-01-18
•
Granted: 1972-11-14
•
Expires: 1991-01-18
Abstract
Abstract A construction block foldable from a flat sheet of material to form a container which may be filled with available solid material and stacked with other such blocks in staggered courses. Interlock tabs project from the center of one horizontal wall of the block and the other horizontal wall is provided with a lateral, central slot arranged to receive interlock tabs from other such blocks. The block may be folded to provide either, two symmetrical lateral interlock tabs for making lateral wall runs, or to provide lateral and transverse tabs for wall corners.
Inventors
- 👤 William C Huber
- 👤 Dale L Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:31
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2002/0202; E04B2002/0204; E04B2002/0206; Y; Y10; Y10S; Y10S229/00; Y10S229/915
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A construction block foldable from a flat sheet of material to form a container suitable for filling with available solid material and which may be stacked with other such blocks in staggered interlocking relation, said block comprising: a box member having a pair of side walls, a pair of end walls connected to said side walls at adjacent vertical edges and top and bottom horizontal walls connected to said side walls and arranged for closing the top and bottom of said box member; a longitudinal vertical partition formed by upward extensions of said bottom horizontal wall forming a longitudinal slot means in said bottom horizontal wall; and interlock tab means extending from said longitudinal vertical partition through the construction block and projecting beyond said top horizontal wall arranged to be insertable into the longitudinal slot means of another of said blocks in a lateral wall run.
Claim 2
Dependent Claim
146 words
A construction block foldable from a flat sheet of material to form a container suitable for filling with available solid material and which may be stacked with other such blocks in staggered interlocking relation, said block comprising: a box member having a pair of side walls, a pair of end walls connected to said side walls at adjacent vertical edges and top and bottom horizontal walls connected to said side walls and arranged for closing the top and bottom of said box member; a longitudinal vertical partition formed by upward extensions of said bottom horizontal wall forming a longitudinal slot means in said bottom horizontal wall; and interlock tab means extending from said longitudinal vertical partition through the construction block and projecting beyond said top horizontal wall arranged to be insertable into the longitudinal slot means of another of said blocks in a lateral wall run.
Claim 3
Dependent Claim
26 words
The invention as claimed in claim 1 wherein: the ratio of the length of said side walls to said end walls is approximately 2 to 1.
Claim 4
Dependent Claim
60 words
The invention as claimed in claim 1 comprising: transverse interlock tab means projecting from said top horizontal wall, said transverse tab means being disposed in a plane generally parallel to said end walls and more proximate of one end wall, arranged to be insertable into the longitudinal slot means of another of said blocks at an angle of 90* thereto.
Claim 5
Dependent Claim
53 words
The invention as claimed in claim 3 wherein: the ratio of the length of said side walls to said end walls is approximately 2 to 1 and the ratio of the distances from said one end wall to said transverse slot means and to said other end wall is approximately 1 to 4.
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |