Patent US4264661A successfully refreshed from Google Patents.
US4264661A
Expired / Lapsed
US
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Thermoplastic article and process for manufacture of same
Assignee: Raychem Corp
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Filing: 1979-11-06
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Granted: 1981-04-28
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Expires: 1999-11-06
Abstract
Abstract The invention is a process for manufacturing an irradiation cross-linked molded article by utilization of molding apparatus wherein at least a portion of the molding apparatus is separable and capable of withstanding irradiation.
Inventors
- 👤 Henry E. Brandolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:29
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0003; B29C37/0017; B29C37/0014; B29C45/00; B29C45/0053; B29C61/00; B29C61/06; B29C71/00; B29C71/04; B29C2045/0075; B29K; B29K2105/00; B29K2105/24; Y; Y10; Y10S; Y10S425/00; Y10S425/058; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331; Y10T428/1352; Y10T428/1397
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
A process for making an article of cross-linked thermoplastic composition comprising the steps of: (a) Molding a thermoplastic composition to form a shaped article having a section thereof of complex configuration in molding apparatus having a separable portion thereof of dielectric material capable of withstanding irradiation, said separable portion being in contact with the section of complex configuration of the article; (b) removing the shaped article from the molding apparatus along with the separable portion remaining in contact with the section of complex configuration; (c) irradiating the article to cross-link it; and (d) removing the separable portion from contact with the article.
Claim 2
Dependent Claim
102 words
A process for making an article of cross-linked thermoplastic composition comprising the steps of: (a) Molding a thermoplastic composition to form a shaped article having a section thereof of complex configuration in molding apparatus having a separable portion thereof of dielectric material capable of withstanding irradiation, said separable portion being in contact with the section of complex configuration of the article; (b) removing the shaped article from the molding apparatus along with the separable portion remaining in contact with the section of complex configuration; (c) irradiating the article to cross-link it; and (d) removing the separable portion from contact with the article.
Claim 3
Dependent Claim
47 words
A process as in claim 1 further including the steps of: (a) Heating the article to a temperature above its material recovery temperature; (b) deforming the article while maintaining said elevated temperature; and (c) cooling the article while maintaining deforming force thereby making the article heat recoverable.
Claim 4
Dependent Claim
29 words
A process as in claim 1 wherein the molding apparatus comprises an injection mold and complimentary core means and said separable portion is a portion of said core means.
Claim 5
Dependent Claim
9 words
A product made by the process of claim 1.
References Cited (Backward Citations)
US2793970A
Cited
US3563973A
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US3548190A
Cited
GB1336869A
Cited
US3923949A
Cited
US4122137A
Cited
US4191158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |