US4076282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded plastic article
Assignee: Phillips Petroleum Co
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Filing: 1976-06-25
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Granted: 1978-02-28
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Expires: 1996-06-25
Abstract
Abstract A molded article comprising a hollow body of a crosslinked polymer rotationally molded around a section of at least one piece of non-crosslinked conduit, which conduits protrude from said hollow body, made by attaching said conduits of non-crosslinked material at the desired location to the mold with said section being located inside a heated section of the mold so that the crosslinkable polymer during a rotational molding process is fused and crosslinked inside of the mold and around and in tight welding-type connection with said section, whereas the remainder of the piece or pieces of uncrosslinked polymer are heat-insulated, thus avoiding deformation or collapsing of these pieces.
Inventors
- 👤 John N. Scott, Jr.
- 👤 Guy E. Carrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:46
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/003; B29C33/00; B29C33/02; B29C41/02; B29C41/20; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/02; B29C66/026; B29C66/05; B29C66/10; B29C66/12; B29C66/128; B29C66/1282; B29C66/1284; B29C66/1288; B29C66/12881; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5224; B29C66/52241; B29C66/5229; B29C66/70; B29C66/73; B29C66/737; B29C66/7375; B29C66/73751; B29C66/73755; B29C66/739; B29C66/7392; B29C66/73921; B29C70/00; B29C70/68; B29C70/84; B29C70/845; F; F16; F16L; F16L47/00; F16L47/26; B29C41/04; B29C66/52291; B29C66/52292; B29C66/52293; B29C66/71; B29C66/7394; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/24; B29K2105/246; B29K2995/00; B29K2995/0037; B29K2995/0063; B29L; B29L2031/00; B29L2031/24; B29L2031/246; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A thermoplastic article comprising (a) a molded hollow body section of crosslinked thermoplastic resin material, and (b) at least two pieces of pipe of a non-crosslinked thermoplastic resin material communicating with the interior of said body section, wherein said body section has been rotationally molded from crosslinkable thermoplastic material in contact with and around said one end of said pieces of pipe of non-crosslinked thermoplastic material.
Claim 2
Dependent Claim
66 words
A thermoplastic article comprising (a) a molded hollow body section of crosslinked thermoplastic resin material, and (b) at least two pieces of pipe of a non-crosslinked thermoplastic resin material communicating with the interior of said body section, wherein said body section has been rotationally molded from crosslinkable thermoplastic material in contact with and around said one end of said pieces of pipe of non-crosslinked thermoplastic material.
Claim 3
Dependent Claim
25 words
An article in accordance with claim 1 wherein both the hollow body section and said pieces of pipe consist essentially of a polymer of ethylene.
Claim 4
Dependent Claim
49 words
An article in accordance with claim 1 wherein at least the hollow body section consists essentially of high density polyethylene having a density of about 0.95 to 0.965 g/cc and a melt index measured in accordance with ASTM D-1238-65T Condition E of about 10 to about 30 g/10 min.
References Cited (Backward Citations)
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US3627869A
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US3966870A
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |