US2908640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion in distillation processes
Assignee: Sunoco Inc
•
Filing: 1956-02-27
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Granted: 1959-10-13
•
Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Patrick F Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:55
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS FOR SEPARATING HYDROCARBONS BY DISTILLATION WHEREIN A PORTION OF THE HYDROCARBONS IS CONVERTED TO VAPOR PHASE, THE VAPORIZED HYDROCARBONS CONTINUOUSLY PASSED TO A CONDENSER HAVING COOLED METAL SURFACES WHEREIN THE VAPORIZED HYDROCARBON ARE CONVERTED TO LIQUID PHASE, AND WHEREIN A PORTION OF TH E CONDENSED HYDROCARBONS IS RETURNED AS REFLUX TO THE DISTILLATION, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY SEPARATING A MINOR PROPORTION OF HYDROCARBONS FROM THE REFLUX, ADMIXING A CORROSION INHIBITOR WITH THE SEPARATE PORTION OF THE REFLUX HYDROCARBONS, AND INJECTING THE RESULTING MIXTURE INTO THE VAPORIZED HYDROCARBONS PASSING TO THE CONDENSER.
Claim 2
Dependent Claim
95 words
IN A PROCESS FOR SEPARATING HYDROCARBONS BY DISTILLATION WHEREIN A PORTION OF THE HYDROCARBONS IS CONVERTED TO VAPOR PHASE, THE VAPORIZED HYDROCARBONS CONTINUOUSLY PASSED TO A CONDENSER HAVING COOLED METAL SURFACES WHEREIN THE VAPORIZED HYDROCARBON ARE CONVERTED TO LIQUID PHASE, AND WHEREIN A PORTION OF TH E CONDENSED HYDROCARBONS IS RETURNED AS REFLUX TO THE DISTILLATION, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY SEPARATING A MINOR PROPORTION OF HYDROCARBONS FROM THE REFLUX, ADMIXING A CORROSION INHIBITOR WITH THE SEPARATE PORTION OF THE REFLUX HYDROCARBONS, AND INJECTING THE RESULTING MIXTURE INTO THE VAPORIZED HYDROCARBONS PASSING TO THE CONDENSER.
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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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |