US3029126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting corrosion in steam generating systems
Assignee: California Research LLC
•
Filing: 1957-05-17
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Granted: 1962-04-10
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Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Chittum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF INHIBITING CORROSION DUE TO STEAM CONDENSING IN THE PRESENCE OF CARBON DIOXIDE AND OXYGEN IN THE CONDENSING ZONE OF A STEAM GENERATING SYSTEM WHERE WATER IS CYCLED THROUGH A BOILER CONVERTING LIQUID WATER TO STEAM, THE CONDENSING ZONE WITH STEAM CONDENSING AND NORMALLY CAUSING CORROSION AT THE ELEVATED TEMPERATURE AND A CONDENSATE LINE RETURNING CONDENSED SPENT STEAM TO THE BOILER WHICH METHOD COMPRISES MAINTAINING A CONCENTRATION OF ALKALI METAL CHLORIDES IN THE TOTAL WATER, LIQUID AND VAPOR IN SAID SYSTEM BELOW 500 P.P.M., CALCULATED ON THE BASIS OF ALL CHLORIDES BEING PRESENT AS SODIUM CHLORIDE AND INTRODUCING INTO THE WATER IN SAID SYSTEM A QUANTITY OF MONOITROALKANE HAVING NO MORE THAN FOUR CARBON ATOMS, SAID QUANTITY BEING SUFFICIENT TO GIVE THE WATER A CONCENTRATION OF SAID NITROALKANE IN THE RANGE OF 0.0001 TO ABOUT 0.2 PERCENT BY WEIGHT.
Claim 2
Independent Claim
141 words
THE METHOD OF INHIBITING CORROSION DUE TO STEAM CONDENSING IN THE PRESENCE OF CARBON DIOXIDE AND OXYGEN IN THE CONDENSING ZONE OF A STEAM GENERATING SYSTEM WHERE WATER IS CYCLED THROUGH A BOILER CONVERTING LIQUID WATER TO STEAM, THE CONDENSING ZONE WITH STEAM CONDENSING AND NORMALLY CAUSING CORROSION AT THE ELEVATED TEMPERATURE AND A CONDENSATE LINE RETURNING CONDENSED SPENT STEAM TO THE BOILER WHICH METHOD COMPRISES MAINTAINING A CONCENTRATION OF ALKALI METAL CHLORIDES IN THE TOTAL WATER, LIQUID AND VAPOR IN SAID SYSTEM BELOW 500 P.P.M., CALCULATED ON THE BASIS OF ALL CHLORIDES BEING PRESENT AS SODIUM CHLORIDE AND INTRODUCING INTO THE WATER IN SAID SYSTEM A QUANTITY OF MONOITROALKANE HAVING NO MORE THAN FOUR CARBON ATOMS, SAID QUANTITY BEING SUFFICIENT TO GIVE THE WATER A CONCENTRATION OF SAID NITROALKANE IN THE RANGE OF 0.0001 TO ABOUT 0.2 PERCENT BY WEIGHT.
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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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |