Patent US3832427A successfully refreshed from Google Patents.
US3832427A
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Process for continuously forming a polymeric resinous layer from a multicomponent liquid reactive mixture
Assignee: Guthrie Ind Ltd
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Filing: 1972-03-29
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Granted: 1974-08-27
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Expires: 1992-03-29
Abstract
Abstract Layers, either coatings or self-supporting films or sheets, of plastics such as polyurethanes resulting from reactive multicomponent mixes having a very short pot life are produced by extruding the mix through an extrusion die having a slit shaped orifice and internal passageways designed to equalize flow to all points along the length of the orifice. The extrusion die is arranged so that all the surface of the passageways can be exposed for manual cleaning in a very short time interval after extrusion ceases so that the reactive mix can be removed by brushing or scraping from the surfaces before it is fully gelled.
Inventors
- 👤 J Mutch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:53
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/34; B29C41/36; B29C48/00; B29C48/022; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/30; B29C48/305; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; B29C48/15; B29C48/154; B29C48/155; B29K; B29K2101/00; B29K2101/10; B29K2301/00; B29K2301/10; Y; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S264/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A process according to claim 1 in which the reactive mix comprises a prepolymer having free hydroxyl groups, a prepolymer having free isocyanate groups and a catalyst.
Claim 2
Dependent Claim
24 words
A process according to claim 1 in which the reactive mix comprises a high molecular weight diol or triol, an isocyanate and a catalyst.
References Cited (Backward Citations)
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |