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Patent US2576386A successfully refreshed from Google Patents.
US2576386A
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Inhibition of scale formation in steam generation
Assignee: ChampionX LLC
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Filing: 1948-12-06
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Granted: 1951-11-27
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Expires: 1968-12-06
Abstract
No abstract record available.
Inventors
- 👤 Paul G Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN THE GENERATION OF STEAM, THE PROCESS OF INHIBITING SCALE WHICH COMPRISES INCORPORATING WITH THE WATER FROM WHICH THE STEAM IS GENERATED A SCALE INHIBITING WATER SOLUBLE COMPOSTION RESULTING FROM THE ALKALINE HYDROLYSIS OF SODIUM LIGNOSULFONATE WITH CAUSTIC SODA AT TEMPERATURES WITHIN THE RANGE OF 200 DEGREES C. TO 225 DEGREES C. FOR A PERIOD OF 20 TO 120 MINUTES UNDER SUPERATMOSPHERIC PRESSURES SUFICIENT TO MAINTAIN THE LIQUID PHASE, THE QUANTITY OF SAID COMPOSITION BEING SUFFICIENT SUBSTANTIALLY TO INHABIT SAID SCALE FORMATION.
Claim 2
Dependent Claim
82 words
IN THE GENERATION OF STEAM, THE PROCESS OF INHIBITING SCALE WHICH COMPRISES INCORPORATING WITH THE WATER FROM WHICH THE STEAM IS GENERATED A SCALE INHIBITING WATER SOLUBLE COMPOSTION RESULTING FROM THE ALKALINE HYDROLYSIS OF SODIUM LIGNOSULFONATE WITH CAUSTIC SODA AT TEMPERATURES WITHIN THE RANGE OF 200 DEGREES C. TO 225 DEGREES C. FOR A PERIOD OF 20 TO 120 MINUTES UNDER SUPERATMOSPHERIC PRESSURES SUFICIENT TO MAINTAIN THE LIQUID PHASE, THE QUANTITY OF SAID COMPOSITION BEING SUFFICIENT SUBSTANTIALLY TO INHABIT SAID SCALE FORMATION.
References Cited (Backward Citations)
US2371136A
Cited
FR619040A
Cited
FR832224A
Cited
US2297670A
Cited
US2200784A
Cited
US2318663A
Cited
US2505457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |