US3863758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compositions
Assignee: Himont Inc
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Filing: 1973-11-29
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Granted: 1975-02-04
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Expires: 1993-11-29
Abstract
Abstract Thermoplastic molding compositions in a lightweight, flexible form are described. The compositions are produced by sandwiching a pulverulent thermoplastic polymer and preferably a mixture of polypropylene flake with glass fibers, between two films of a thermoplastic polymer compatible with the pulverulent polymer and then heat sealing the resulting sandwich at least along the open edges to encapsulate the pulverulent polymer between the films.
Inventors
- 👤 Frank J Connelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; C; C08; C08J; C08J5/00; C08J5/04; B32B2315/00; B32B2315/08; B32B2315/085; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/046; B32B2323/10; B32B2327/00; B32B2327/06; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/24; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
A THERMOPLASTIC MOLDING COMPOSITION IN THE FORM OF A PACKET CONSISTING ESSENTIALLY OF A BLEND OF PULVERULENT THERMOPLASTIC FILM-FORMING POLYMER AND UP TO 85 PERCENT BY WEIGHT OF SAID BLEND OF REINFORCING FIBERS SELECTED FROM THE GROUP CONSISTING OF GLASS FIBERS, ASBESTOS FIBERS, GRAPHITE FIBERS AND CARBON FIBERS ENCLOSED BETWEEN TWO THERMOPLASTIC COVER FILMS OF THE SAME POLYMER AS SAID PULVERULENT THERMOPLASTIC POLYMER, SAID COVER FILMS BEING HEAT SEALED AT LEAST ALONG THE OPEN EDGES.
Claim 2
Dependent Claim
75 words
A THERMOPLASTIC MOLDING COMPOSITION IN THE FORM OF A PACKET CONSISTING ESSENTIALLY OF A BLEND OF PULVERULENT THERMOPLASTIC FILM-FORMING POLYMER AND UP TO 85 PERCENT BY WEIGHT OF SAID BLEND OF REINFORCING FIBERS SELECTED FROM THE GROUP CONSISTING OF GLASS FIBERS, ASBESTOS FIBERS, GRAPHITE FIBERS AND CARBON FIBERS ENCLOSED BETWEEN TWO THERMOPLASTIC COVER FILMS OF THE SAME POLYMER AS SAID PULVERULENT THERMOPLASTIC POLYMER, SAID COVER FILMS BEING HEAT SEALED AT LEAST ALONG THE OPEN EDGES.
Claim 3
Dependent Claim
18 words
The packet of claim 1 wherein said thermoplastic polymer is polypropylene and the reiniforcing fibers are glass fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |