Patent US3833453A successfully refreshed from Google Patents.
US3833453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonflammable, fiber-filled, cold-formable thermoplastic sheet
Assignee: Honeywell International Inc
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Filing: 1971-08-04
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Granted: 1974-09-03
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Expires: 1991-08-04
Abstract
Abstract Glass fiber-reinforced ethylene chlorotrifluoroethylene composite sheets are formable into shaped objects in a mold at ambient temperatures solely by moderate preheating of the sheet outside of the mold. This polymer comprising a high molecular weight, tough copolymer of ethylene and chlorotrifluoroethylene in an approximate 1:1 mol ratio is inherently nonflammable in air. A glass fiber of controlled length increases the mechanical properties of the composite structure and allows fabrication into suitable shapes without detracting from the nonflammable properties of the polymeric composite.
Inventors
- 👤 L Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:40
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B23; B23B; B23B27/00; B23B27/08; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B32; B32B; B32B27/00; B32B27/32; B32B27/322; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2027/00; B29K2027/12; B29K2309/00; B29K2309/08; B29K2995/00; B29K2995/0037; B29K2995/0088; B29L; B29L2007/00; B29L2007/008; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
18 words
A sheet in accordance with claim 1 characterized by at least two sheets formed into a laminated composite.
Claim 2
Dependent Claim
14 words
The laminated composite of claim 2 wherein at least one laminate is unfilled polymer.
Claim 3
Dependent Claim
14 words
The laminated composite of claim 3 wherein the unfilled polymer laminate is ethylene-chlorotrifluoroethylene copolymer.
Claim 4
Dependent Claim
41 words
The laminated composite of claim 2 wherein at least one laminate of the composite is an ethylene-chlorotrifluoroethylene copolymer incorporating a filler selected from the group consisting of alumina, feldspar, talc, asbestos, limestone, lime, graphite, and siliceous materials other than glass fiber.
Claim 5
Dependent Claim
92 words
A glass reinforced high impact resin article having high interlaminer strength and an oxygen index of at least 64 percent formed in shaping apparatus held at ambient temperature and consisting essentially of a copolymer of ethylene-chlorotrifluoroethylene having a melting temperature greater than 240*C., a degree of monomer alternation greater than 70 percent and a melt index of 0.5 to 50 incorporating a glass fiber reinforcement in amounts of at least 5 percent by weight of the total weight of the composition, said glass fiber having a length of at least one inch.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |