Patent US1927607A successfully refreshed from Google Patents.
Patent US2870220A successfully refreshed from Google Patents.
US2870220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nonionic surface active agents
Assignee: Union Carbide Corp
•
Filing: 1953-08-11
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Granted: 1959-01-20
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Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Clare A Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/30; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
THE PROCESS WHICH COMPRISES IN A FIRST STAGE PASSING ETHYLENE OXIDE INTO A SECONDARY ALKANOL HAVING 10 TO 17 CARBON ATOMS, HELD AT A TEMPERATURE WITHIN THE RANGE FROM 0*C. TO 80*C. IN THE PRESENCE OF AN ACIDIC CATALYST OF THE CLASS CONSISTING OF THE FRIEDEL-CRAFTS TYPE CATALYST SULFURIC ACID AND PHOSPHORIC ACID, UNTIL BETWEEN 0.2 MOL. AND 4 MOLS OF THE EHTYLENE OXIDE HA VE REACTED PER MOL OF THE ALCOHOL, NEUTRALIZING THE RESULTANT REACTION MIXTURE, REMOVING UNREACTED ALKANOL, AND IN A SECOND STAGE REACTING THE REDIDUAL MIXTURE OF MONALKYL ETHERS OF THE MONOAND POLYETHYLENE GLYCOLS WITH ETHYLENE OXIDE IN THE PRESENCE OF AN ALKALI METAL ALCONHOLATE OF A MONOALKYL ETHER OF AT LEAST ONE POLYETHYLENE GLYCOL UNTIL A TOTAL OF BETWEEN 4 AND 20 MOLS OF ETHYLENE OXIDE HAVE REACTED PER MOL OF THE ALKANOL REACTED IN THE FIRST STAGE.
Claim 2
Dependent Claim
142 words
THE PROCESS WHICH COMPRISES IN A FIRST STAGE PASSING ETHYLENE OXIDE INTO A SECONDARY ALKANOL HAVING 10 TO 17 CARBON ATOMS, HELD AT A TEMPERATURE WITHIN THE RANGE FROM 0*C. TO 80*C. IN THE PRESENCE OF AN ACIDIC CATALYST OF THE CLASS CONSISTING OF THE FRIEDEL-CRAFTS TYPE CATALYST SULFURIC ACID AND PHOSPHORIC ACID, UNTIL BETWEEN 0.2 MOL. AND 4 MOLS OF THE EHTYLENE OXIDE HA VE REACTED PER MOL OF THE ALCOHOL, NEUTRALIZING THE RESULTANT REACTION MIXTURE, REMOVING UNREACTED ALKANOL, AND IN A SECOND STAGE REACTING THE REDIDUAL MIXTURE OF MONALKYL ETHERS OF THE MONOAND POLYETHYLENE GLYCOLS WITH ETHYLENE OXIDE IN THE PRESENCE OF AN ALKALI METAL ALCONHOLATE OF A MONOALKYL ETHER OF AT LEAST ONE POLYETHYLENE GLYCOL UNTIL A TOTAL OF BETWEEN 4 AND 20 MOLS OF ETHYLENE OXIDE HAVE REACTED PER MOL OF THE ALKANOL REACTED IN THE FIRST STAGE.
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |