US3568626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identifying means for buried utilities
Assignee: AT&T Inc
•
Filing: 1967-11-08
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Granted: 1971-03-09
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Expires: 1987-11-08
Abstract
Abstract Excavators are warned of the proximity of buried cables or other buried utilities by burying above the utilities lengths of extensible and stretchable nonfrangible wires or tapes located to be moved by excavating instruments and marked to indicate the existence of the utilities. Preferably, the wires or tapes include magnetic or radioactive portions which can be sensed above ground prior to excavation to locate and identify utilities.
Inventors
- 👤 Hamilton Southworth Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
H; H02; H02G; H02G9/00; H02G9/02; H02G9/025; Y; Y10; Y10S; Y10S116/00; Y10S116/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
An assembly comprising an area of soil, an element of construction buried in said area of soil, longitudinal identifying means buried in said area of soil above said element of construction but spaced therefrom, said identifying means including a length of longitudinally infrangible means having strength sufficient to be substantially infrangible across the length when encountered by excavating equipment, said infrangible means including material having a color contrasting with that of the earth whereby to facilitate the location of said element of construction, said infrangible means including a pair of nylon cords and stretchable plastic means encasing said nylon cords, said stretchable plastic means being of a color contrasting with the soil.
Claim 2
Dependent Claim
112 words
An assembly comprising an area of soil, an element of construction buried in said area of soil, longitudinal identifying means buried in said area of soil above said element of construction but spaced therefrom, said identifying means including a length of longitudinally infrangible means having strength sufficient to be substantially infrangible across the length when encountered by excavating equipment, said infrangible means including material having a color contrasting with that of the earth whereby to facilitate the location of said element of construction, said infrangible means including a pair of nylon cords and stretchable plastic means encasing said nylon cords, said stretchable plastic means being of a color contrasting with the soil.
Claim 3
Dependent Claim
33 words
An assembly as in claim 1 wherein said infrangible means includes plastic ribbon means folded about said nylon cords to form an elongated strip with the encased nylon cords at the edges thereof.
Claim 4
Dependent Claim
13 words
An assembly as in claim 2 wherein said infrangible means are edge upright.
References Cited (Backward Citations)
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Cited
US2772993A
Cited
US2994958A
Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |