US3204537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway illuminating device
Assignee: Cataphote Inc
•
Filing: 1963-04-08
•
Granted: 1965-09-07
•
Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 William H Searight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:24
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/35; E01C7/353; G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; G02B5/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A VEHICLE ROADWAY COMPRISING IN COMBINATION AT LEAST A RELATIVELY DARK LIGHT ABSORBING TOP SURFACE AND MICROSCOPIC GLASS BEADS OF A SIZE BETWEEN 20 AND 100 MESH, SAID GLASS BEADS EXTENDING ACROSS THE ENTIRE AREA OF SAID LIGHT ABSORBING TOP SURFACE AND BEING PARTIALLY EMBEDDED THEREIN IN CLOSELY PACKED RELATIONSHIP, CERTAIN OF SAID BEADS PROJECTING FROM SAID LIGHT ABSORBING TOP SURFACE AND EACH SAID BEADS HAVING A REFRACTIVE INDEX OF AT LEAST 1.9 TO PROVIDE A SPECULAR REFLECTIVE LAYER ON SAID LIGHT ABSORBING TOP SURFACE RESPONSIVE TO PERIPHERAL LIGHT RAYS FROM VEHICLE HEAD LAMPS INPINGING THEREON AT GRAZING ANGLES OF FROM ABOUT 1.5 TO ABOUT 5 DEGREES.
Claim 2
Dependent Claim
107 words
A VEHICLE ROADWAY COMPRISING IN COMBINATION AT LEAST A RELATIVELY DARK LIGHT ABSORBING TOP SURFACE AND MICROSCOPIC GLASS BEADS OF A SIZE BETWEEN 20 AND 100 MESH, SAID GLASS BEADS EXTENDING ACROSS THE ENTIRE AREA OF SAID LIGHT ABSORBING TOP SURFACE AND BEING PARTIALLY EMBEDDED THEREIN IN CLOSELY PACKED RELATIONSHIP, CERTAIN OF SAID BEADS PROJECTING FROM SAID LIGHT ABSORBING TOP SURFACE AND EACH SAID BEADS HAVING A REFRACTIVE INDEX OF AT LEAST 1.9 TO PROVIDE A SPECULAR REFLECTIVE LAYER ON SAID LIGHT ABSORBING TOP SURFACE RESPONSIVE TO PERIPHERAL LIGHT RAYS FROM VEHICLE HEAD LAMPS INPINGING THEREON AT GRAZING ANGLES OF FROM ABOUT 1.5 TO ABOUT 5 DEGREES.
References Cited (Backward Citations)
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US2070432A
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US2366715A
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US2366754A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |