US2858186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of filamentary articles from polymer latexes
Assignee: Dow Chemical Co
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Filing: 1956-10-05
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Granted: 1958-10-28
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Expires: 1976-10-05
Abstract
No abstract record available.
Inventors
- 👤 John R Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:53
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/32; B; B29; B29B; B29B13/00; B29B13/02; B29B13/023; B29C; B29C53/00; B29C53/02; B29C67/00; B29C67/02; B29C67/04; B29C67/20; B29D; B29D7/00; B29D7/01; D01D; D01D5/00; D01D5/22; Y; Y10; Y10S; Y10S260/00; Y10S260/22; Y10S264/00; Y10S264/61; Y10S264/73; Y10S8/00; Y10S8/10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR PREPARING CONTINUOUS FILAMENTRAY ARTICLES FROM POLYMER LATEXES CONSISTINF OF FORMING A CONTINUOUS COHERENT STRIP OF COAGULUM BY CONTINUOUSLY CONTACTING A SOLID SURFACE WETTED WITH A COAGULANT WITH A FILM FORMING LATEX OF A NORMALLY CRYSTALLINE POLYMER, WASHING SAID STRIP TO REMOVE SUBSTANTIALLY ALL OF THE COAGULANT, DRYING SAID STRIP OF COAGULUM UNDER CONDITIONS THAT THE POROUS STRUCTURE IS NOT SIGNIFICANTLY ALTERED, FORWARDING SAID STRIP WITHOUT APPLIED TENSION THROUGH A RADIANTLY HEATED ZONE MAINTAINED AT A TEMPERATURE SUFFICIENT TO SINTER AND CURL THE STRIP AND FOR A TIME SUFFICIENT TO FORM A CONTINUOUS FILAMENTARY ARTICLE CURLED ABOUT ITS LONGITUDINAL AXIS, SUPERCOOLING SAID ARTICLE, AND FINALLY EOIENTING SAID ARTICLE BY STRETCHING.
Claim 2
Dependent Claim
112 words
A PROCESS FOR PREPARING CONTINUOUS FILAMENTRAY ARTICLES FROM POLYMER LATEXES CONSISTINF OF FORMING A CONTINUOUS COHERENT STRIP OF COAGULUM BY CONTINUOUSLY CONTACTING A SOLID SURFACE WETTED WITH A COAGULANT WITH A FILM FORMING LATEX OF A NORMALLY CRYSTALLINE POLYMER, WASHING SAID STRIP TO REMOVE SUBSTANTIALLY ALL OF THE COAGULANT, DRYING SAID STRIP OF COAGULUM UNDER CONDITIONS THAT THE POROUS STRUCTURE IS NOT SIGNIFICANTLY ALTERED, FORWARDING SAID STRIP WITHOUT APPLIED TENSION THROUGH A RADIANTLY HEATED ZONE MAINTAINED AT A TEMPERATURE SUFFICIENT TO SINTER AND CURL THE STRIP AND FOR A TIME SUFFICIENT TO FORM A CONTINUOUS FILAMENTARY ARTICLE CURLED ABOUT ITS LONGITUDINAL AXIS, SUPERCOOLING SAID ARTICLE, AND FINALLY EOIENTING SAID ARTICLE BY STRETCHING.
References Cited (Backward Citations)
US2730758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |