US3062631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion
Assignee: Universal Oil Products Co
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Filing: 1958-12-05
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Granted: 1962-11-06
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Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:40
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221; C10L1/24; C10L1/2493; C10M; C10M149/00; C10M149/12; C10M149/14; C10M151/00; C10M151/04; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/40; C10M2207/404; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/135; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
HYDROCARBON OIL CONTAINING FROM ABOUT 0.0001% TO ABOUT 10% BY WEIGHT OF AN INHIBITOR PREPARED BY FIRST CONDENSING EQUIMOLAR PROPORTIONS OF A BETA-LACTONE CONTAINING FROM ABOUT 3 TO ABOUT 6 CARBON ATOMS PER MOLECULE AND A POLYAMINE CONTAINING FROM ABOUT 8 TO FROM 70 CARBON ATOMS PER MOLECULE AT A TEMPERATURE OF FROM ABOUT 10*C. TO ABOUT 200*C. FOR ABOUT 0.5 TO ABOUT 5 HOURS AND THEREAFTER MAINTAINING THE CONDENSATION PRODUCT AT A TEMPERATURE OF FROM ABOUT 100* TO ABOUT 200* C. FOR ABOUT 0.5 TO ABOUT 10 HOURS.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |