US4677006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seamless laminar article
Assignee: EIDP Inc
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Filing: 1985-05-29
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Granted: 1987-06-30
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Expires: 2005-05-29
Abstract
Abstract Seamless, molded, thermoplastic articles are disclosed having a laminar, multi-component composition with a heterogeneous blend of incompatible polymers-at least one as a matrix and at least one as a discontinuous phase. Knit lines in the article are curved to obscure seams and increase strength.
Inventors
- 👤 Alvin S. Topolski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:35
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/22; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29C48/335; B29C48/34; B29C48/36; B29C48/362; B32; B32B; B32B27/00; B32B27/30; B32B27/306; B32B27/32; B32B27/34; B32B27/36; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0819; B29C2949/082; B29C2949/0829; B29C48/10; B32B2323/00; B32B2323/04; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/1397; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A laminar, molded, hollow article comprising a combination of a first polymer component and a second polymer component incompatible with the first wherein the first polymer component is present in the article as a continuous matrix phase and the second polymer component is present in the article as thin, substantially two-dimensional, parallel and overlapping layes of material wherein knit lines in the article are curved to provide such overlapping layers in any radial section through a wall of the hollow article.
Claim 2
Dependent Claim
81 words
A laminar, molded, hollow article comprising a combination of a first polymer component and a second polymer component incompatible with the first wherein the first polymer component is present in the article as a continuous matrix phase and the second polymer component is present in the article as thin, substantially two-dimensional, parallel and overlapping layes of material wherein knit lines in the article are curved to provide such overlapping layers in any radial section through a wall of the hollow article.
Claim 3
Dependent Claim
13 words
The article of claim 1 wherein the first polymer component is a polyolefin.
Claim 4
Dependent Claim
16 words
The article of claim 1 wherein there is also included an alkylcarboxyl-substituted polyolefin as a compatibilizer.
Claim 5
Dependent Claim
11 words
The article of claim 1 in the form of a parison.
Claim 6
Dependent Claim
36 words
The article of claim 1 in the form, of a blow-molded container having a substantially uniform wall thickness around the perimeter of the container from the knit line area to areas adjacent the knit line area.
Claim 7
Dependent Claim
31 words
The article of claim 1 wherein there is an alkylcarboxyl-substituted polyolefin present in the article between the matrix and the discontinuous layers and adheres the matrix and the discontinuous layers together.
Claim 8
Dependent Claim
14 words
The article of claim 2 wherein the second polymer component is a condensation polymer.
Claim 9
Dependent Claim
15 words
The article of claim 7 wherein the condensation polymer is a polyamide or a polyester.
Claim 10
Dependent Claim
23 words
The article of claim 7 wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polybutylene, and copolymers of those materials.
Claim 11
Dependent Claim
85 words
A laminar, molded, hollow, article comprising a combination of 60-99.4 weight percent polyolefin, 0.5-40 weight percent of a condensation polymer incompatible with the polyolefin, and 0.1-10 weight percent of an alkylcarboxyl-substituted polyolefin wherein the polyolefin is present as a continuous matrix phase, the condensation polymer is present as a discontinuous distribution of thin, substantially two-dimensional, parallel and overlapping layers and wherein mold knit lines in the article are curved to provide such overlapping layers in any radial section through a wall of the hollow article.
Claim 12
Dependent Claim
85 words
A laminar, molded, hollow, article comprising a combination of 60-99.4 weight percent polyolefin, 0.5-40 weight percent of a condensation polymer incompatible with the polyolefin, and 0.1-10 weight percent of an alkylcarboxyl-substituted polyolefin wherein the polyolefin is present as a continuous matrix phase, the condensation polymer is present as a discontinuous distribution of thin, substantially two-dimensional, parallel and overlapping layers and wherein mold knit lines in the article are curved to provide such overlapping layers in any radial section through a wall of the hollow article.
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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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |