US3272736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing corrosion
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1964-07-23
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Granted: 1966-09-13
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Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Petro
- 👤 Paul E Krystow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C10; C10G; C10G7/00; C10G7/10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L1/1233; C10L1/1266
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
THE PROCESS OF CLAIM 1 WHEREIN THE DISTILLATION IS A IN METALLIC DISTILLATION EQUIPMENT USED FOR THE DISTILLATION OF A PETROLEUM FRACTION SAID FRACTION CONTAINING AN ALKALINE EARTH CHLORIDE AND WATER WHICH COMPRISES ADMIXING AMMONIUM CARBONATE AND A BASE, SAID BASE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND MIXTURES THEREOF, WITH SAID PETROLEUM FRACTION PRIOR TO RAISING THE TEMPERATURE OF SAID FRACTION TO A LEVEL OF AT LEAST ABOUT 200*F. AND THEREBY AVOIDING HYDROLYSIS OF THE ALKALINE EARTH CHLORIDES AND THEREAFTER DISTILLING SAID PETROLEUM FRACTION.
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |