Patent US3607516A successfully refreshed from Google Patents.
US3607516A
Expired / Lapsed
US
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Methods of coating pipe
Assignee: Chase Corp
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Filing: 1969-12-02
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Granted: 1971-09-21
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Expires: 1989-12-02
Abstract
Abstract A method is provided for forming an electrically insulative pipe by the steps of assembling an elongated wrapper having an inner band of self-adhering adhesive and an outer band of a mechanically strong material and wrapping said wrapper about a pipe to be protected with one side edge being bent upon itself so as to form an exposed edge of adhesive engaging the adhesive on the opposite edges of the wrap whereby to form an adhesive-toadhesive bond at the overlap.
Inventors
- 👤 John H Royston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:08
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A method as claimed in claim 1 wherein the wrapper is applied helically about the pipe and the overlap of each succeeding wrap forms a helical rib from one end of the pipe to the other.
Claim 2
Dependent Claim
18 words
A method as claimed in claim 1 wherein the pipe is coated with a primer prior to wrapping.
Claim 3
Dependent Claim
35 words
A method as claimed in claim 1 wherein the outer layer is a member from the group consisting of ethylene-vinyl acetate, polypropylene, polyvinyl chloride, polycarbonates, cellulose acetate, cellulose butyrate, polyesters, polystyrene, polyethylene copolymer and polyolefins.
Claim 4
Dependent Claim
39 words
A method as claimed in claim 1 wherein the inner layer is a member from the group consisting of natural rubber, styrene butadiene rubber, butyl rubber, neoprene, nitrile rubber, ethylene propylene copolymer or terpolymer, polyvinyl chloride and polysulfide rubber.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |