US4500577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal pipe coated with thermoplastic synthetic resin
Assignee: Nippon Paint Co Ltd
•
Filing: 1983-12-01
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Granted: 1985-02-19
•
Expires: 2003-12-01
Abstract
Abstract A metal pipe melt-coated with a thermoplastic synthetic resin using an adhesive composition which contains as major components 5-50 parts by weight of an oil-soluble phenol resin, 5-60 parts by weight of an ethylene copolymer and 5-50 parts by weight of a petroleum hydrocarbon compound having a mean molecular weight in the range of 50,000 to 1,000,000.
Inventors
- 👤 Jiro Satake
- 👤 Tetsuzo Arai
- 👤 Kivokazu Tanaka
- 👤 Eiji Mikami
- 👤 Tsuneo Moriyasu
- 👤 Tadasu Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/109; Y; Y10; Y10S; Y10S138/00; Y10S138/01; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/31859; Y10T428/31877
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A coated metal pipe having the exterior surface thereof coated with a protective film of a thermoplastic synthetic resin through an adhesive material consisting essentially of: (a) about 10% by weight of an oil soluble alkyl phenol resin (b) about 30% by weight of an ethylene-ethylacrylate resin having a melt index of 25 (c) about 25% by weight butyl rubber and (d) about 30% of aliphatic petroleum resin having a softening point of 130° C., the balance being inorganic filler material.
Claim 2
Dependent Claim
81 words
A coated metal pipe having the exterior surface thereof coated with a protective film of a thermoplastic synthetic resin through an adhesive material consisting essentially of: (a) about 10% by weight of an oil soluble alkyl phenol resin (b) about 30% by weight of an ethylene-ethylacrylate resin having a melt index of 25 (c) about 25% by weight butyl rubber and (d) about 30% of aliphatic petroleum resin having a softening point of 130° C., the balance being inorganic filler material.
Claim 3
Dependent Claim
21 words
A coated metal pipe according to claim 1 wherein said synthetic resin protective coating is a hot melt applied polyolefin coating.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |