US3737263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the formation of composite plastic bodies
Assignee: Dow Chemical Co
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Filing: 1971-10-18
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Granted: 1973-06-05
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Expires: 1991-10-18
Abstract
Abstract Apparatus is described for making articles of plastic materials; for example, plastic bottles, from a composite of synthetic thermoplastics. Two or more such resinous materials, which have distinct polymeric and physical characteristics, are combined in a way such that they are present in the article in separate phases and in a manner adapted to take full advantage of the resulting combination of properties.
Inventors
- 👤 W Schrenk
- 👤 K Cleereman
- 👤 D Chisholm
- 👤 T Alfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:36
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/16; B29C45/164; B29C48/00; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/19; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C2045/0098; B29C48/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The apparatus of claim 1 including means to provide a third stream of a synthetic resinous material interposed between the first and second streams.
Claim 2
Dependent Claim
22 words
The apparatus of claim 1 wherein the means to receive a stream is a tubing die adapted to deliver a tubular article.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 wherein the means to receive the stream from the discharge passage is a mold.
Claim 4
Dependent Claim
26 words
The apparatus of claim 4 including means to molecularly orient the heat plastified synthetic resinous material from a discharge passage as the material is being shaped.
Claim 5
Dependent Claim
21 words
The apparatus of claim 5 wherein the means to receive and shape the stream has a cavity having a cup-shaped configuration.
References Cited (Backward Citations)
US3130448A
Cited
US3223761A
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US3281897A
Cited
US3405662A
Cited
US3339240A
Cited
US3349437A
Cited
US3520966A
Cited
US3565985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |