US3799956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active agent and method of preparing the same
Assignee: Toho Chemical Industry Co Ltd
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Filing: 1970-10-12
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Granted: 1974-03-26
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Expires: 1990-10-12
Abstract
Abstract A NOVEL SURFACE ACTIVE AGENT COMPRISING A PHOSPHOROUS TRIESTER-TYPE COMPOUND HAVING THE FOLLOWING FORMULA: R1-O-P(-O-R2)-O-R3 WHEREIN R1 IS A CONVENTIONAL NONIONIC SURFACE ACTIVE AGENT RESIDUE TO WHICH ETHYLENE OXIDE OR BOTH ETHYLENE OXIDE AND PROPYLENE OXIDE IS ADDED AND R2 AND R3 ARE TO CONVENTIONAL NONIOONIC SURFACE ACTIVE AGENY RESIDUE TO WHICH ETHYLENE OXIDE OR BOTH ETHYLENE OXIDE AND PROPYLENE OXIDE IS ADDED OR AN ALKYL GROUP HAVING 8 TO 22 CARBON ATOMS AND ITS PREPAATION ARE DESCRIBED. THE SURFACE ACTIVE AGENT IS SUPERIOR IN SURFACE ACTIVITY HEAT RESISTING STABILITY AND A REDUCED FOAMING PROPERTY.
Inventors
- 👤 S Aman
- 👤 K Kojima
- 👤 Y Nakamura
- 👤 R Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:30
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/78; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1411; C09; C09K; C09K23/00; C09K23/14; C09K3/00; C09K3/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |