Patent US4996504A successfully refreshed from Google Patents.
Patent US3559355A successfully refreshed from Google Patents.
US3559355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building construction system and components therefor
Assignee: Inland Ryerson Construction
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Filing: 1966-03-10
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Granted: 1971-02-02
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Expires: 1986-03-10
Abstract
Abstract A COMPOSITE, STRUCTURAL LOAD BEARING BUILDING UNIT HAVING MEMBRANE PANELS SEPARATED BY LIGHTWEIGHT SPACER MEMBERS, THE MEMBRANE PANELS HAVING A RETICULATED SUBFORM COVERED WITH A SKIN OF CEMENTITIOUS MATERIAL TO PROVIDE A COMPOSITE STRUCTURE WHICH IS CAPABLE OF SUPPORTING LOADS MUCH GREATER THAN THE CAPABILITY OF THE LIGHTWEIGHT SPACER MEMBERS. A BUILDING SYSTEM WITH INTERCONNECTED COMPOSITE STRUCTURAL ASSEMBLIES.
Inventors
- 👤 Paul Thorndyke Day Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:29
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04B; E04B1/00; E04B1/16; E04B1/161; E04G; E04G9/00; E04G9/02; E04G9/06; E04G9/065; E04B2/00; E04B2/84; E04B2/842; E04B2/845; E04B2/86; E04B2002/8694
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |