US3597497A
Expired / Lapsed
US
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Polyethylene oxide as in antifoaming agent for polyamides,polyesters,polyesteramides,polycarbonates and polyureas
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1966-09-02
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Granted: 1971-08-03
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Expires: 1986-09-02
Abstract
Abstract A METHOD OF PRODUCING VISCUOUS HIGH MOLECULAR WEIGHT MATERIALS THROUGH AH EATING REACTION ASSOCIATED WITH THE REMOVAL OF VOLATILE MATERIALS, THE PROCESS BEING CHARACTERIZED IN THAT THE HEATING REACTION IS EFFECTED UNDER THE COEXISTENCE OF AN ORGANIC POLYETHER MATERIAL HAVING A MOLECULAR WEIGHT NOT LESS THAN 10,000. SUCH ORGANIC MATERIALS ARE PRESENT IN AN AMOUNT OF FROM 0.01 TO 100,000 P.P.M., SAID ORGANIC MATERIAL BEING ONE WHICH, WHEN ADDED IN AN AMOUNT OF MORE THAN TWO PERCENT BY WEIGHT BASED ON THE VISCOUS HIGH MOLECULAR WEIGHT MATERIAL BEING PRODUCED, CAN CAUSE A PHASE SEPARATION.
Inventors
- 👤 Koji Ohno
- 👤 Koichi Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02; C08G; C08G69/00; C08G69/02; C08G69/04; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S525/00; Y10S525/927
Claims Analysis
Total Claims: 0
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |