Patent US4388359A successfully refreshed from Google Patents.
US4388359A
Expired / Lapsed
US
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Embossed pavement-marking sheet material
Assignee: 3M Co
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Filing: 1982-04-23
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Granted: 1983-06-14
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Expires: 2002-04-23
Abstract
Abstract Pavement-marking sheet material having protuberances on its upper surface which carry partially exposed microspheres by which the protuberances are made retroreflective and which are separated by recessed areas in which microspheres are fully embedded and not exposed, so as to improve the daytime appearance of the sheet material.
Inventors
- 👤 John L. Ethen
- 👤 Timothy D. Bredahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/50; E01F9/506; E01F9/512; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24479; Y10T428/25; Y10T428/252; Y10T428/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
159 words
Pavement-marking sheet material comprising a continuous polymeric base sheet having its upper surface configured with a multitude of protuberances which in total occupy at least 10 percent of the area of the base sheet, said protuberances having at least one dimension in the plane of the base sheet that is less than about 15 millimeters, having a height of at least about one millimeter, and having a side surface that is adapted to face oncoming traffic when the sheet material is applied to a roadway and which forms an angle to the plane of the base sheet of at least about 30°, said side surface carrying transparent microspheres at least near the top of the protuberance, which are partially embedded in the surface and partially protrude out of the surface, and the areas of the base sheet between the protuberances being substantially free of protruding microspheres but containing microspheres which have been substantially fully pressed into the base sheet.
Claim 2
Dependent Claim
159 words
Pavement-marking sheet material comprising a continuous polymeric base sheet having its upper surface configured with a multitude of protuberances which in total occupy at least 10 percent of the area of the base sheet, said protuberances having at least one dimension in the plane of the base sheet that is less than about 15 millimeters, having a height of at least about one millimeter, and having a side surface that is adapted to face oncoming traffic when the sheet material is applied to a roadway and which forms an angle to the plane of the base sheet of at least about 30°, said side surface carrying transparent microspheres at least near the top of the protuberance, which are partially embedded in the surface and partially protrude out of the surface, and the areas of the base sheet between the protuberances being substantially free of protruding microspheres but containing microspheres which have been substantially fully pressed into the base sheet.
Claim 3
Dependent Claim
25 words
Sheet material of claim 1 in which all dimensions of the protuberances in the plane of the base sheet are less than about 15 millimeters.
Claim 4
Dependent Claim
30 words
Sheet material of claims 1 or 2 in which the protuberances have at least one dimension in the plane of the base sheet that is less than about 10 millimeters.
Claim 5
Dependent Claim
23 words
Sheet material of claim 1 in which the protuberances occupy no more than about 50 percent of the area of the base sheet.
Claim 6
Dependent Claim
28 words
Sheet material of claim 1 in which said side surface of the protuberances forms an angle of at least about 60° to the plane of the base sheet.
Claim 7
Dependent Claim
31 words
Sheet material of claim 1 in which the concentration of microspheres on the side surfaces of the protuberances is less near the base of the side surfaces than near the top.
Claim 8
Dependent Claim
17 words
Sheet material of claim 1 in which the areas between protuberances form a connected grid of valleys.
Claim 9
Dependent Claim
15 words
Sheet material of claim 1 in which the base sheet comprises an unvulcanized elastomer precursor.
Claim 10
Dependent Claim
170 words
Pavement-marking sheet material comprising a continuous viscoelastic polymeric base sheet that comprises an unvulcanized elastomer precursor and which has its upper surface configured with a multitude of protuberances which in total occupy between about 10 and 50 percent of the area of the base sheet, said protuberances having at least one dimension in the plane of the base sheet that is less than about 15 millimeters, having a height of at least about one millimeter, and having a side surface that is adapted to face oncoming traffic when the sheet material is applied to a roadway and which forms an angle to the plane of the base sheet of at least about 60°, said side surface carrying transparent microspheres at least near the top of the protuberance, which are partially embedded in the surface and partially protrude out of the surface, and the areas of the base sheet between the protuberances being substantially free of protruding microspheres but containing microspheres which have been substantially fully pressed into the base sheet.
Claim 11
Dependent Claim
170 words
Pavement-marking sheet material comprising a continuous viscoelastic polymeric base sheet that comprises an unvulcanized elastomer precursor and which has its upper surface configured with a multitude of protuberances which in total occupy between about 10 and 50 percent of the area of the base sheet, said protuberances having at least one dimension in the plane of the base sheet that is less than about 15 millimeters, having a height of at least about one millimeter, and having a side surface that is adapted to face oncoming traffic when the sheet material is applied to a roadway and which forms an angle to the plane of the base sheet of at least about 60°, said side surface carrying transparent microspheres at least near the top of the protuberance, which are partially embedded in the surface and partially protrude out of the surface, and the areas of the base sheet between the protuberances being substantially free of protruding microspheres but containing microspheres which have been substantially fully pressed into the base sheet.
Claim 12
Dependent Claim
25 words
Sheet material of claim 9 in which all dimensions of the protuberances in the plane of the base sheet are less than about 15 millimeters.
Claim 13
Dependent Claim
25 words
Sheet material of claim 9 in which all dimensions of the protuberances in the plane of the base sheet are less than about 10 millimeters.
Claim 14
Dependent Claim
28 words
Sheet material of claim 9 in which the areas between protuberances form a connected grid of valleys running diagonally with respect to the direction of expected road travel.
References Cited (Backward Citations)
CA868524A
Cited
US1518988A
Cited
US3190178A
Cited
US3253971A
Cited
US3587415A
Cited
US3989775A
Cited
US3935365A
Cited
US3879148A
Cited
US4069281A
Cited
US4117192A
Cited
US4123140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |