Patent US3698290A successfully refreshed from Google Patents.
US3698290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Street curbings made of synthetic resins
Assignee: Individual
•
Filing: 1971-01-21
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Granted: 1972-10-17
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Expires: 1991-01-21
Abstract
Abstract A street curbing comprising an outer polyethylene shell reinforced with fiberglass. The shell is filled with high density polyethylene foam.
Inventors
- 👤 Robert J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:49
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/22; E01C11/221; E01C11/222
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
In a combination as recited in claim 1 wherein said anchor elements are constructed so that said shell is free to expand and contract relative to said concrete mass.
Claim 2
Dependent Claim
56 words
In a combination as recited in claim 1 wherein said anchoring means includes means fixed to said shell and embedded in said concrete backing and a lubricant between said embedded means and said concrete backing, said embedded means being shaped to permit said shell to expand and contract relative to said backing aided by said lubricant.
Claim 3
Dependent Claim
18 words
In a combination as recited in claim 1 wherein said shell is filled with a synthetic resin foam.
Claim 4
Dependent Claim
54 words
In a combination as recited in claim 1 wherein at least one of said anchoring elements comprises an extension of the wall of said shell embedded in said concrete mass, extending parallel to the horizontal axis of said shell throughout the horizontal length of said shell, and shaped to be in more than plane.
Claim 5
Dependent Claim
47 words
In a combination as recited in claim 1 wherein at least one of said anchoring elements embedded in said concrete mass includes a shank portion and a foot portion, said foot portion projecting angularly from said shank portion to lock such anchoring element in said concrete mass.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |