US3613325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete construction
Assignee: Individual
•
Filing: 1969-07-10
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Granted: 1971-10-19
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Expires: 1989-07-10
Abstract
Abstract A CONSTRUCTION SYSTEM UTILIZING A PLURALITY OF COMBINATION COLUMN AND BEAM UNITS OR TREES ASSEMBLABLE SO AS TO DEFINE A CONCRETE BUILDING FRAME FOR THE RECEPTION OF A PLURALITY OF PRE-FORMED CONCRETE SLABS. EACH TREE CONSISTES OF UPPER AND LOWER COLUMN SECTIONS WHICH JOIN AT MID-HEIGHT TO SIMILAR COLUMN SECTIONS ON SUBJACENT AND SUPERJACENT TREES, THE JOINING BEING EFFECTED THROUGH EMBEDDED SPLICE SLEEVES. EACH UPPER COLUMN SECTION IS SPACED ABOVE THE TRANSVERSE TREE BEAM TO WHICH IT IS JOINED FOR THE ACCOMMODIATION OF A SLAB JOINING POUR WHEREBY A POSITIVE INTERLOCK BETWEEN THE BEAM-SUPPORTED SLABS AND THE FRAME UNIT OR TREE IS ACHEIVED.
Inventors
- 👤 Alfred Alphonse Yee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:05
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |