US2939842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitor
Assignee: Universal Oil Products Co
•
Filing: 1957-12-30
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Granted: 1960-06-07
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:14
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A CORROSION INHIBITOR COMPOSITION CONSISTING ESSENTIALLY OF A POLYBASIC CARBOXYLIC ACID SALT OF AN ALKYLENE POLYAMINE AND FROM ABOUT 0.05% TO ABOUT 10% BY WEIGHT OF THE CONDENSATION PRODUCT, FORMED AT A TEMPERATURE OF FROM ABOUT 80* C. TO ABOUT 200* C., OF AN EQUIVALENT OF POLYOXYETHYLENE ROSIN AMINE CONTAINING FROM 6 TO 40 OXYETHYLENE GROUPS WITH AN EQUIVALENT OF A TERPENE-MALEIC ANHYDRIDE REACTION PRODUCT FORMED BY REACTING, AT A TEMPERATURE OF FROM ABOUT 150* C. TO ABOUT 300* C., AN EQUIVALENT OF MALEIC ANHYDRIDE WITH AN EQUIVALENT OF A TERPENE HAVING THE FORMULA C10H16 AND A BOILING POINT RANGING FROM ABOUT 150* TO ABOUT 185* C.
Claim 2
Dependent Claim
107 words
A CORROSION INHIBITOR COMPOSITION CONSISTING ESSENTIALLY OF A POLYBASIC CARBOXYLIC ACID SALT OF AN ALKYLENE POLYAMINE AND FROM ABOUT 0.05% TO ABOUT 10% BY WEIGHT OF THE CONDENSATION PRODUCT, FORMED AT A TEMPERATURE OF FROM ABOUT 80* C. TO ABOUT 200* C., OF AN EQUIVALENT OF POLYOXYETHYLENE ROSIN AMINE CONTAINING FROM 6 TO 40 OXYETHYLENE GROUPS WITH AN EQUIVALENT OF A TERPENE-MALEIC ANHYDRIDE REACTION PRODUCT FORMED BY REACTING, AT A TEMPERATURE OF FROM ABOUT 150* C. TO ABOUT 300* C., AN EQUIVALENT OF MALEIC ANHYDRIDE WITH AN EQUIVALENT OF A TERPENE HAVING THE FORMULA C10H16 AND A BOILING POINT RANGING FROM ABOUT 150* TO ABOUT 185* C.
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |