US3629378A
Expired / Lapsed
US
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Method of extracting tri-substituted hydrocarbyl phosphates
Assignee: Toyama Chemical Co Ltd
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Filing: 1968-09-11
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Granted: 1971-12-21
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Expires: 1988-09-11
Abstract
Abstract SELECTIVE SEPARATION OF THE TRI-SUBSTITUTED HYDROCARBYL PHOSPHATES ONLY BY EXTRACTION FROM AN AQUEOUS SOLUTION OF WATER-SOLUBLE TRI-SUBSTITUTED HYDROCARBYL PHOSPHATES OF THE FORMULA (RO)2P(O)(OR'') WHEREIN R IS AN ALKYL OR ALKENYL GROUP HAVING 1 TO 3 CARBON ATOMS OR SAID GROUPS SUBSTITUTED BY CHLORINE AND R'' IS AN ALKYL OR ALKENYL GROUP HAVING 1 TO 4 CARBON ATOMS OR SAID GROUPS SUBSITUTED BY CHLORINE. THE COMPOUNDS ARE USEFUL AS ADDITIVES FOR GASOLINE, PLASTICIZERS FOR THERMOPLASTIC RESINS AND FLAME RETARDING AGENTS FOR RIGID POLYURETHANE FOAM, POLYESTER RESIN, ETC.
Inventors
- 👤 Yutaka Kodama
- 👤 Tsutomu Kodama
- 👤 Masao Nakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:28
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |