Patent US3625259A successfully refreshed from Google Patents.
US3625259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precoated underground piping
Assignee: Trenton Corp
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Filing: 1969-10-15
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Granted: 1971-12-07
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Expires: 1989-10-15
Abstract
Abstract A protective cover for an underground conduit having a raised weld. The cover consists of a relatively hard corrosion-resistant precoating applied over the weld, and an elongated protective strip wrapped around the conduit, with or without a primary coating under the strip.
Inventors
- 👤 Ted Kennedy Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:48
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1063; B; B29; B29C; B29C63/00; B29C63/02; B29C63/04; B29C63/048
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
In combination with a length of underground metal pipe having a weld seam, a protective cover for said pipe comprising a narrow area of a thermosetting corrosion-resistant coating, said coating covering the weld seam and a narrow portion only adjacent each side of said seam, and an adhesive coated corrosion-resistant plastic strip helically wrapped around the entire pipe for the length thereof, the adhesive side of said plastic strip contacting the surface of said pipe.
Claim 2
Dependent Claim
75 words
In combination with a length of underground metal pipe having a weld seam, a protective cover for said pipe comprising a narrow area of a thermosetting corrosion-resistant coating, said coating covering the weld seam and a narrow portion only adjacent each side of said seam, and an adhesive coated corrosion-resistant plastic strip helically wrapped around the entire pipe for the length thereof, the adhesive side of said plastic strip contacting the surface of said pipe.
Claim 3
Dependent Claim
13 words
The combination set forth in claim 1, wherein said coating is relatively hard.
Claim 4
Dependent Claim
21 words
The combination set forth in claim 1, wherein said plastic strip comprises an elongated dielectric plastic resinous strip of corrosion-resistant material.
Claim 5
Dependent Claim
26 words
The combination set forth in claim 1, wherEin a primer compatible with the adhesive is applied over the pipe and coating and under the plastic strip.
References Cited (Backward Citations)
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Cited
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |