US2587249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of corrosion in steam lines
Assignee: EF Drew and Co Inc
•
Filing: 1947-02-18
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Granted: 1952-02-26
•
Expires: 1967-02-18
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ulmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:15
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF PREVENTING CORROSION OF STEAM LINES WHICH COMPRISES FEEDING INTO THE WATER OF A STEAM BOILER AN ALGINIC ACID COMPOUND OF AMMONIA, SAID COMPOUND BEING ADAPTED TO DECOMPOSE GRADUALLY AT TEMPERATURES OF STEAM FORMATION TO PROVIDE FREE GASEOUS AMMONIA, TOGETHER WITH AN EXCESS OF AMMONIA IN AN AMOUNT UP TO 25% OF THAT REQUIRED TO COMBINE WITH SAID ALGINIC ACID.
Claim 2
Independent Claim
62 words
A METHOD OF PREVENTING CORROSION OF STEAM LINES WHICH COMPRISES FEEDING INTO THE WATER OF A STEAM BOILER AN ALGINIC ACID COMPOUND OF AMMONIA, SAID COMPOUND BEING ADAPTED TO DECOMPOSE GRADUALLY AT TEMPERATURES OF STEAM FORMATION TO PROVIDE FREE GASEOUS AMMONIA, TOGETHER WITH AN EXCESS OF AMMONIA IN AN AMOUNT UP TO 25% OF THAT REQUIRED TO COMBINE WITH SAID ALGINIC ACID.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |