US2675351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing corrosion and scale
Assignee: EF Drew and Co Inc
•
Filing: 1950-03-27
•
Granted: 1954-04-13
•
Expires: 1970-03-27
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ulmer
- 👤 Jr John A Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/105; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF PREVENTING CORROSION OF STEAM BOILERS AND STEAM AND CONDENSATE LINES WHICH COMPRISES ADDING TO BOILER WATER A COMPOSITION MADE BY MIXING IN AQUEOUS SOLUTION ABOUT 20 PARTS BY WEIGHT OF AN ALKALI METAL NITRITE AND 1-3 PARTS OF ALGINIC ACID, HEATING SAID WATER TO FORM STEAM UNDER HIGH PRESSURE TO CAUSE A CHEMICAL REACTION TO TAKE PLACE WITH THE FORMATION OF FREE AMMONIA IN SUFFICIENT AMOUNTS TO RENDER THE STEAM ALKALINE AND SIMULTANEOUSLY FORMING A FILM ON THE METAL OF THE BOILER TO PROVIDE PROTECTION AGAINST SCALE FORMATION AND CORROSION.
Claim 2
Independent Claim
93 words
A METHOD OF PREVENTING CORROSION OF STEAM BOILERS AND STEAM AND CONDENSATE LINES WHICH COMPRISES ADDING TO BOILER WATER A COMPOSITION MADE BY MIXING IN AQUEOUS SOLUTION ABOUT 20 PARTS BY WEIGHT OF AN ALKALI METAL NITRITE AND 1-3 PARTS OF ALGINIC ACID, HEATING SAID WATER TO FORM STEAM UNDER HIGH PRESSURE TO CAUSE A CHEMICAL REACTION TO TAKE PLACE WITH THE FORMATION OF FREE AMMONIA IN SUFFICIENT AMOUNTS TO RENDER THE STEAM ALKALINE AND SIMULTANEOUSLY FORMING A FILM ON THE METAL OF THE BOILER TO PROVIDE PROTECTION AGAINST SCALE FORMATION AND CORROSION.
References Cited (Backward Citations)
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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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |