Patent US3328818A successfully refreshed from Google Patents.
US3328818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced walk ramp
Assignee: Individual
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Filing: 1965-03-31
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Granted: 1967-07-04
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ruth J Melcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:26
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A REINFORCED RAMP STRUCTURE: A SHEET OF MATERIAL COMPRISING A LOAD-SUPPORTING PLATFORM HAVING AN UPPER SURFACE AND AN OPPOSED UNDERSIDE; A PLURALITY OF LONGITUDINAL REINFORCING BEAMS SECURED TO THE UNDERSIDE OF SAID SHEET AND EXTENDING CONTINUOUSLY ALONG THE LENGTH THEREOF IN PARALLEL TRANSVERSELY SPACED LONGITUDINAL POSITIONS; EACH OF SAID BEAMS COMPRISING: AN UPRIGHT LONGITUDINAL WEB FORMED OF FIBROUS GLASS IMPREGNATED WITH RESIN; A LONGITUDINAL FLANGE EXTENDING OUTWARD FROM THE UPPER EDGE OF THE WEB AND SECURED TO THE UNDERSIDE OF SAID SHEET ALONG THE LENGTH THEREOF, SAID FLANGE INCLUDE A CONTINUATION OF SAID FIBROUS GLASS IMPREGNATED WITH RESIN AND FORMED INTEGRALLY WITH SAID WEB;
Claim 2
Dependent Claim
105 words
IN A REINFORCED RAMP STRUCTURE: A SHEET OF MATERIAL COMPRISING A LOAD-SUPPORTING PLATFORM HAVING AN UPPER SURFACE AND AN OPPOSED UNDERSIDE; A PLURALITY OF LONGITUDINAL REINFORCING BEAMS SECURED TO THE UNDERSIDE OF SAID SHEET AND EXTENDING CONTINUOUSLY ALONG THE LENGTH THEREOF IN PARALLEL TRANSVERSELY SPACED LONGITUDINAL POSITIONS; EACH OF SAID BEAMS COMPRISING: AN UPRIGHT LONGITUDINAL WEB FORMED OF FIBROUS GLASS IMPREGNATED WITH RESIN; A LONGITUDINAL FLANGE EXTENDING OUTWARD FROM THE UPPER EDGE OF THE WEB AND SECURED TO THE UNDERSIDE OF SAID SHEET ALONG THE LENGTH THEREOF, SAID FLANGE INCLUDE A CONTINUATION OF SAID FIBROUS GLASS IMPREGNATED WITH RESIN AND FORMED INTEGRALLY WITH SAID WEB;
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |