US3132013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating feed water
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1960-09-26
•
Granted: 1964-05-05
•
Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Kumamoto Tokuji
- 👤 Abe Kaneshi
- 👤 Miyamoto Yoshihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:51
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS OF REMOVING OXYGEN FROM OXYGEN-CONTAINING FEED WATER FOR USE IN A BOILER, COMPRISING THE STEPS OF SPRAYING FEED WATER AT AMBIENT TEMPERATURE DOWN INTO A BODY OF FEED WATER AT AMBIENT TEMPERATURE AND WITHDRAWING FEED WATER FROM THE BODY OF FEED WATER AT RATES FOR MAINTAING A CONSTANT LEVEL OF FEED WATER IN SAID BODY OF FEED WATER, AND BLOWING NITROGEN OF AT LEAST 99.7% PURITY INTO THE BOTTOM OF SAID BODY OF FEED WATER UNDER A PRESSURE OF AT LEAST 0.2 KG./CM.2 IN THE FORM OF FINE BUBBLES IN AN AMOUNT PER UNIT FROM 1.5 TO 2 TIMES THE AMOUNT OF SAID FEED WATER TO BE TREATED PER UNIT TIME, SAID AMOUNTS BEING MEASURED IN VOLUMES.
Claim 2
Dependent Claim
119 words
A PROCESS OF REMOVING OXYGEN FROM OXYGEN-CONTAINING FEED WATER FOR USE IN A BOILER, COMPRISING THE STEPS OF SPRAYING FEED WATER AT AMBIENT TEMPERATURE DOWN INTO A BODY OF FEED WATER AT AMBIENT TEMPERATURE AND WITHDRAWING FEED WATER FROM THE BODY OF FEED WATER AT RATES FOR MAINTAING A CONSTANT LEVEL OF FEED WATER IN SAID BODY OF FEED WATER, AND BLOWING NITROGEN OF AT LEAST 99.7% PURITY INTO THE BOTTOM OF SAID BODY OF FEED WATER UNDER A PRESSURE OF AT LEAST 0.2 KG./CM.2 IN THE FORM OF FINE BUBBLES IN AN AMOUNT PER UNIT FROM 1.5 TO 2 TIMES THE AMOUNT OF SAID FEED WATER TO BE TREATED PER UNIT TIME, SAID AMOUNTS BEING MEASURED IN VOLUMES.
References Cited (Backward Citations)
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US2120297A
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US2649166A
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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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |