US2990431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion control in condensing systems
Assignee: Phillips Petroleum Co
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Filing: 1958-09-17
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Granted: 1961-06-27
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Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 John T Cabbage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:54
CPC Classifications
C; C23; C23F; C23F15/00; B; B01; B01D; B01D5/00; B01D5/0033; B01D5/0054; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD FOR SUBSTANTIALLY ELIMINATING CORROSION OF EQUIPMENT USED TO PROCESS AN EFFUENT STREAM WHICH, AS PRODUCED, IS ABOVE THE DEW POINT OF WATER IN THE EQUIPMENT UNDER THE CONDITIONS PREVAILING UPON ITS PRODUCTION AND WHICH CONTAINS ACID GENERATING OR ACIDIC MATERIAL, WHICH IN CONTACT WITH LIQUID WATER, CAUSES CORROSION OF APPARATUS CONTAINING THE EFFLUENT STREAM AND WHICH EFFLUENT STREAM IS NEUTRALIZED IN ENSUING TREATMENT AND WHEREIN THE NEUTRALIZING AGENT WILL BE CRYSTALLIZED AND UNDESIRABLY PLUG EQUIPMENT UNLESS NEUTRALIZATION IS EFFECTED AT A TEMPERATURE AT OR BELOW THE DEW POINT OF WATER, THE STEPS WHICH COMPRISE MAINTAINING SAID EFFLUENT STREAM ABOVE THE DEW POINT OF WATER IN THE EQUIPMENT UNDER THE CON-
Claim 2
Independent Claim
112 words
A METHOD FOR SUBSTANTIALLY ELIMINATING CORROSION OF EQUIPMENT USED TO PROCESS AN EFFUENT STREAM WHICH, AS PRODUCED, IS ABOVE THE DEW POINT OF WATER IN THE EQUIPMENT UNDER THE CONDITIONS PREVAILING UPON ITS PRODUCTION AND WHICH CONTAINS ACID GENERATING OR ACIDIC MATERIAL, WHICH IN CONTACT WITH LIQUID WATER, CAUSES CORROSION OF APPARATUS CONTAINING THE EFFLUENT STREAM AND WHICH EFFLUENT STREAM IS NEUTRALIZED IN ENSUING TREATMENT AND WHEREIN THE NEUTRALIZING AGENT WILL BE CRYSTALLIZED AND UNDESIRABLY PLUG EQUIPMENT UNLESS NEUTRALIZATION IS EFFECTED AT A TEMPERATURE AT OR BELOW THE DEW POINT OF WATER, THE STEPS WHICH COMPRISE MAINTAINING SAID EFFLUENT STREAM ABOVE THE DEW POINT OF WATER IN THE EQUIPMENT UNDER THE CON-
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |