US4534673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric pavement marker
Assignee: 3M Co
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Filing: 1983-04-11
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Granted: 1985-08-13
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Expires: 2003-04-11
Abstract
Abstract Described is a raised pavement marker comprised of (referring to FIG. 1): a flexible foam body 2, a reflective film 4, and a pressure-sensitive adhesive 3. Raised portion 5 provides back support for the reflective film. This pavement marker has significant advantages over existing markers in terms of cost and ease of placement on the road surface. A lane delineation tape is also disclosed.
Inventors
- 👤 David C. May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:25
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/50; E01F9/553; E01F9/565; E01F9/573; E01F9/576; E01F9/578
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A roadway marker comprising a body having a base which can be attached to the surface of a roadway without requiring a recess or hole in the roadway, and which has a raised surface adapted to face oncoming traffic when the marker is mounted on a roadway, and a reflective material attached to said raised surface on the side adapted to face oncoming traffic, said body being made of a cellular elastomer having a compressive strength of 25 percent compression at less than about 100 kPa.
Claim 2
Dependent Claim
86 words
A roadway marker comprising a body having a base which can be attached to the surface of a roadway without requiring a recess or hole in the roadway, and which has a raised surface adapted to face oncoming traffic when the marker is mounted on a roadway, and a reflective material attached to said raised surface on the side adapted to face oncoming traffic, said body being made of a cellular elastomer having a compressive strength of 25 percent compression at less than about 100 kPa.
Claim 3
Dependent Claim
26 words
The roadway marker as recited in claim 1 made of an elastomer having a compressive strength at 25 percent compression of about 41 to 100 kPa.
Claim 4
Dependent Claim
32 words
The roadway marker of claim 1 in which the elastomer is selected from the group consisting of polyurethane, silicone rubber, neoprene rubber, ethylene propylene diene terpolymer, and blends of neoprene and EPDM.
Claim 5
Dependent Claim
24 words
The roadway marker of claim 1 which has a reflecting surface inclined to the base by an angle θ of from 45° to 135°.
Claim 6
Dependent Claim
49 words
A roadway marker comprising a body: (A) made of a cellular elastomer having a compressive strength of less than about 100 kPa at 25 percent compression; (B) having a base which can be attached to the surface of a roadway without requiring a recess or hole in the roadway;
Claim 7
Dependent Claim
49 words
A roadway marker comprising a body: (A) made of a cellular elastomer having a compressive strength of less than about 100 kPa at 25 percent compression; (B) having a base which can be attached to the surface of a roadway without requiring a recess or hole in the roadway;
Claim 8
Dependent Claim
82 words
(C) having raised surface adapted to face oncoming traffic when the marker is mounted on a roadway; (D) having a reflective material attached to said raised surface on the side adapted to face oncoming traffic; and (E) having a shape which supports the back of the raised surface; said raised surface characterized by lying flat and face down when struck by a vehicle wheel applying a load of at least 96 KPa and moving toward the reflective side of the raised surface.
Claim 9
Dependent Claim
82 words
(C) having raised surface adapted to face oncoming traffic when the marker is mounted on a roadway; (D) having a reflective material attached to said raised surface on the side adapted to face oncoming traffic; and (E) having a shape which supports the back of the raised surface; said raised surface characterized by lying flat and face down when struck by a vehicle wheel applying a load of at least 96 KPa and moving toward the reflective side of the raised surface.
Claim 10
Dependent Claim
11 words
The roadway marker of claim 5 which has a hollow cross-section.
Claim 11
Dependent Claim
61 words
The roadway marker of claim 5 on which the base extends to a position rearward of the raised surface, a portion of the body extends from said rearward position to the back of the raised surface, and the portion of the body extending from said rearward position to the back of the raised surface forms an acute angle with the base.
Claim 12
Dependent Claim
23 words
The roadway marker of claim 7 on which the raised surface is inclined to the base at an angle of 45° to 135°
Claim 13
Dependent Claim
18 words
The roadway marker of claim 7 on which the body has a relief cut below the raised surface.
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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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |