Patent US3830893A successfully refreshed from Google Patents.
US3830893A
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US
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Method of processing high nitrile preforms
Assignee: Monsanto Co
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Filing: 1972-04-25
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Granted: 1974-08-20
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Expires: 1992-04-25
Abstract
Abstract TUBULAR PREFORMS FORMED OF A SYNTHETIC RESIN, THE MAJOR CONSTITUENT OF WHICH IS POLYMERIZED NITRILE MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND MIXTURES THEREOF, ARE RAPIDLY HEATED TO A TEMPERATURE AT WHICH MOLECULAR ORIENTATION OCCURS ON STRETCHING BY EXPOSING THE BOODY PORTIONS OF SUCH PERFORMS TO MICROWAVE ENERGY FOR A PRIOD OF FROM 1/2 TO 30 SECONDS TO HEAT SUCH BODY PORTIONS TO A TEMPERATURE OF BETWEEN 250 TO 320* F. WITHOUT DEFORMING A PRIOR MOLDED FINISHED NECK SECTION THEREOF AND WITHOUT SUBSTANTIALLY DEGRADING THE RESIN.
Inventors
- 👤 S Steingiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:21
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/023; B29B13/024; B29C; B29C49/00; B29C49/42; B29C49/64; B29C49/6409; B29C49/6418; B29C49/6436; B29C49/6445; B29C49/68; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822; B29C2035/0855; B29C49/78; B29C49/786; B29C2049/7861; B29C2049/7862; B29C2949/00; B29C2949/07; B29C2949/0715; B29C35/12; B29C49/02; B29C49/06; B29K; B29K2033/00; B29K2033/18; B29K2633/00; B29K2633/18; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |