US3195277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete slab construction
Assignee: CECO CORP
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Filing: 1961-06-16
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Granted: 1965-07-20
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Gerald G Greulich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:01
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/06; B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/12; E04B; E04B5/00; E04B5/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A RECTANGULAR PRESTRESSED CONCRETE SLAB HAVING AN ANCHOR PLATE MOUNTED AT EACH CORNER OF THE SLAB, EACH ANCHOR PLATE EXTENDING DIAGONALLY INWARD FROM ITS ADJOINING CORNER OF THE SLAB AND EACH PLATE HAVING A NOTCHED EXPOSED CORNER RECEIVING A SUPPORT FOR THE CORNER OF SAID SLAB, EACH ANCHOR PLATE PROVIDED WITH A VERTICAL ANCHORING FLANGE DISPOSED PERPENDICULAR TO EACH ADJACENT EDGE OF THE SLAB AND CENTRALLY DISPOSED ANCHORING FLANGE PERPENDICULAR TO THE DIAGONAL OF THE SLAB INTERSECTING THE PLATE, EACH FLANGE HAVING A PLURALITY OF HORIZONTALLY ARRANGED OPENINGS EXTENDING THERETHROUGH, A PLURALITY OF PRETENSIONED REINFORCING STRANDS EXTENDING PERIPHERALLY ALONG THE MARGIN OF THE SLAB AND OTHER PRETENSIONED STRANDS EXTENDING DIAGONALLY OF THE SLAB BETWEEN SAID PLATES, EACH OPENING RECEIVING AN END OF ONE OF SAID STRANDS, AND MEANS ANCHORING THE ENDS OF THE STRANDS TO THE ANCHORING FLANGES ON SAID ANCHOR PLATES AND MAINTAINING THE REQUISITE TENSION ON SAID REINFORCING STRANDS TO PRODUCE A PRECOMPRESSION IN THE SET CONCRETE SLAB.
Claim 2
Dependent Claim
160 words
A RECTANGULAR PRESTRESSED CONCRETE SLAB HAVING AN ANCHOR PLATE MOUNTED AT EACH CORNER OF THE SLAB, EACH ANCHOR PLATE EXTENDING DIAGONALLY INWARD FROM ITS ADJOINING CORNER OF THE SLAB AND EACH PLATE HAVING A NOTCHED EXPOSED CORNER RECEIVING A SUPPORT FOR THE CORNER OF SAID SLAB, EACH ANCHOR PLATE PROVIDED WITH A VERTICAL ANCHORING FLANGE DISPOSED PERPENDICULAR TO EACH ADJACENT EDGE OF THE SLAB AND CENTRALLY DISPOSED ANCHORING FLANGE PERPENDICULAR TO THE DIAGONAL OF THE SLAB INTERSECTING THE PLATE, EACH FLANGE HAVING A PLURALITY OF HORIZONTALLY ARRANGED OPENINGS EXTENDING THERETHROUGH, A PLURALITY OF PRETENSIONED REINFORCING STRANDS EXTENDING PERIPHERALLY ALONG THE MARGIN OF THE SLAB AND OTHER PRETENSIONED STRANDS EXTENDING DIAGONALLY OF THE SLAB BETWEEN SAID PLATES, EACH OPENING RECEIVING AN END OF ONE OF SAID STRANDS, AND MEANS ANCHORING THE ENDS OF THE STRANDS TO THE ANCHORING FLANGES ON SAID ANCHOR PLATES AND MAINTAINING THE REQUISITE TENSION ON SAID REINFORCING STRANDS TO PRODUCE A PRECOMPRESSION IN THE SET CONCRETE SLAB.
References Cited (Backward Citations)
US692309A
Cited
US1444806A
Cited
FR900581A
Cited
DE820576C
Cited
GB680907A
Cited
US2689999A
Cited
US2964143A
Cited
FR1119999A
Cited
US2995799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |