US2857333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors
Assignee: Universal Oil Products Co
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Filing: 1956-06-20
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Granted: 1958-10-21
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Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:43
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A CORROSION INHIBITOR COMPOSITION COMPRISING (1) AN ALKYL ACID PHOSPHATE SALT OF AN N-ALKYL-DIAMINOALKANE IN WHICH THE ALKYL GROUP OF THE ACID PHOSPHATE CONTAINS FROM ABOUT 6 TO ABOUT 20 CARBON ATOMS AND THE ALKYL GROUP OF SAID DIAMINOALKANE CONTAINS FROM ABOUT 8 TO ABOUT 18 CARBON ATOMS, AND (2) FROM ABOUT 0.1% TO ABOUT 25% BY WEIGHT OF SAID SALT OF THE MIXED CONDENSATION PRODUCT OF (A) ONE EQUIVALENT OF N,N-DIETHYL-ETHANOLAMINE AND N-METHYL-DIETHANOLAMINE WITH (B) ONE EQUIVALENT OF THE REACTION PRODUCT OF A TERPENE HAVING THE FORMULA C10H16 AND A BOILING POINT RANGING FROM ABOUT 150* TO ABOUT 185*C. WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ALPHA, BETA-UNSATURATED POLYCARBOXYLIC ACID, ANHYDRIDE AND ESTER THEREOF, SAID TERPENE AND SAID COMPOUND HAVING BEEN REACTED AT A TEMPERATURE OF FROM ABOUT 150* TO ABOUT 300*C. TO FORM SAID REACTION PRODUCT, AND SAID N,N-DIETHYL-ETHANOLAMINE AND N-METHYL-DIETHANOLAMINE HAVING BEEN CONDENSED WITH SAID REACTION PRODUCT AT A TEMPERATURE OF FROM ABOUT 80* TO ABOUT 200*C. TO FORM SAID MIXED CONDENSATION PRODUCT.
Claim 2
Dependent Claim
169 words
A CORROSION INHIBITOR COMPOSITION COMPRISING (1) AN ALKYL ACID PHOSPHATE SALT OF AN N-ALKYL-DIAMINOALKANE IN WHICH THE ALKYL GROUP OF THE ACID PHOSPHATE CONTAINS FROM ABOUT 6 TO ABOUT 20 CARBON ATOMS AND THE ALKYL GROUP OF SAID DIAMINOALKANE CONTAINS FROM ABOUT 8 TO ABOUT 18 CARBON ATOMS, AND (2) FROM ABOUT 0.1% TO ABOUT 25% BY WEIGHT OF SAID SALT OF THE MIXED CONDENSATION PRODUCT OF (A) ONE EQUIVALENT OF N,N-DIETHYL-ETHANOLAMINE AND N-METHYL-DIETHANOLAMINE WITH (B) ONE EQUIVALENT OF THE REACTION PRODUCT OF A TERPENE HAVING THE FORMULA C10H16 AND A BOILING POINT RANGING FROM ABOUT 150* TO ABOUT 185*C. WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ALPHA, BETA-UNSATURATED POLYCARBOXYLIC ACID, ANHYDRIDE AND ESTER THEREOF, SAID TERPENE AND SAID COMPOUND HAVING BEEN REACTED AT A TEMPERATURE OF FROM ABOUT 150* TO ABOUT 300*C. TO FORM SAID REACTION PRODUCT, AND SAID N,N-DIETHYL-ETHANOLAMINE AND N-METHYL-DIETHANOLAMINE HAVING BEEN CONDENSED WITH SAID REACTION PRODUCT AT A TEMPERATURE OF FROM ABOUT 80* TO ABOUT 200*C. TO FORM SAID MIXED CONDENSATION PRODUCT.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |