Patent US3201400A successfully refreshed from Google Patents.
US3201400A
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US
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Propylene oxide adducts of 1-{2[bis(2-hydroxypropyl) amino]ethyl}-4-(2-hydroxypropyl)-piperazine
Assignee: Texaco Inc
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Filing: 1962-07-16
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Granted: 1965-08-17
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Bedoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5054; C08G18/506
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
AN ADDUCT HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
AN ADDUCT HAVING THE FORMULA:
Claim 3
Independent Claim
106 words
A METHOD WHICH COMPRISES THE STEPS OF REACTING 1-(2(BIS(2-HYDROXYPROPYL)AMINO)ETHYL)-4-(2-HYDROXYPROPYL)-PIPERAZINE WITH FROM ABOUT 6 TO ABOUT 120 MOLS OF PROPYLENE OXIDE IN THE PRESENCE OF A BASE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 110* TO ABOUT 150* C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 40 TO ABOUT 60 P.S.I.G. TO PROVIDE A BASIC CRUDE REACTION PRODUCT, CONTACTING SAID BASIC CRUDE REACTION PRODUCT WITH OXALIC ACID IN AN AMOUNT EQUIVALENT TO THE AMOUNT OF SAID BASE INITIALLY EMPLOYED, AND FILTERING SAID NEUTRALIZED REACTION PRODUCT TO OBTAIN A PURIFIED PROPYLENE OXIDE ADDUCT OF LOW ASH CONTENT AND ODOR, SAID PORPYLENE OXIDE ADDUCT HAVING THE FORMULA.
Claim 4
Independent Claim
106 words
A METHOD WHICH COMPRISES THE STEPS OF REACTING 1-(2(BIS(2-HYDROXYPROPYL)AMINO)ETHYL)-4-(2-HYDROXYPROPYL)-PIPERAZINE WITH FROM ABOUT 6 TO ABOUT 120 MOLS OF PROPYLENE OXIDE IN THE PRESENCE OF A BASE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 110* TO ABOUT 150* C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 40 TO ABOUT 60 P.S.I.G. TO PROVIDE A BASIC CRUDE REACTION PRODUCT, CONTACTING SAID BASIC CRUDE REACTION PRODUCT WITH OXALIC ACID IN AN AMOUNT EQUIVALENT TO THE AMOUNT OF SAID BASE INITIALLY EMPLOYED, AND FILTERING SAID NEUTRALIZED REACTION PRODUCT TO OBTAIN A PURIFIED PROPYLENE OXIDE ADDUCT OF LOW ASH CONTENT AND ODOR, SAID PORPYLENE OXIDE ADDUCT HAVING THE FORMULA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |