US2968629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting corrosion
Assignee: Universal Oil Products Co
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Filing: 1958-09-29
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Granted: 1961-01-17
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:51
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF INHIBITING CORROSION OF A METAL SURFACE UPON CONTACT WITH WATER, WHICH COMPRISES EFFECTING SAID CONTACT IN THE PRESENCE OF A CORROSION INHIBITING CONCENTRATION OF THE CONDENSATION PRODUCT, FORMED AT A TEMPERATURE OF FROM ABOUT AMBIENT TO ABOUT 100*C., OF A BETA-LACTONE CONTAINING FROM ABOUT 3 TO ABOUT 6 CARBON ATOMS PER MOLECULE AND A POLYAMINE CONTAINING FROM ABOUT 8 TO ABOUT 70 CARBON ATOMS PER MOLECULE, SAID LACTONE REACTING WITH FROM ABOUT 10% TO ABOUT 100% OF THE NITROGEN IN SAID AMINE.
Claim 2
Independent Claim
85 words
A METHOD OF INHIBITING CORROSION OF A METAL SURFACE UPON CONTACT WITH WATER, WHICH COMPRISES EFFECTING SAID CONTACT IN THE PRESENCE OF A CORROSION INHIBITING CONCENTRATION OF THE CONDENSATION PRODUCT, FORMED AT A TEMPERATURE OF FROM ABOUT AMBIENT TO ABOUT 100*C., OF A BETA-LACTONE CONTAINING FROM ABOUT 3 TO ABOUT 6 CARBON ATOMS PER MOLECULE AND A POLYAMINE CONTAINING FROM ABOUT 8 TO ABOUT 70 CARBON ATOMS PER MOLECULE, SAID LACTONE REACTING WITH FROM ABOUT 10% TO ABOUT 100% OF THE NITROGEN IN SAID AMINE.
References Cited (Backward Citations)
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |