Patent US2630296A successfully refreshed from Google Patents.
Patent US3566569A successfully refreshed from Google Patents.
US3566569A
Expired / Lapsed
US
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Flooring structure
Assignee: EL Bruce Co
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Filing: 1969-04-04
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Granted: 1971-03-02
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Expires: 1989-04-04
Abstract
Abstract A FLOORING STRUCTURE HAS A PLURALITY OF SPACED PARALLEL METAL CHANNELS IN EACH OF WHICH IS SECURED A NAILING STRIP. FLOORBOARDS ARE SUPPORTED ON THE STRIP-CHANNEL ASSEMBLIES AND SECURED THERETO BY NAILS WHICH PASS THROUGH THE FLOORBOARDS AND NAILING STRIPS AND ARE CLINCHED TO THE BOTTOMS OF THE NAILING STRIPS. THE STRIP-CHANNEL ASSEMBLIES ARE SECURED TO A FOUNDATION.
Inventors
- 👤 Harry E Coke
- 👤 Jack R Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:41
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/02; E04F15/04; E04F2201/00; E04F2201/05; E04F2201/0517
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |