Patent US2253454A successfully refreshed from Google Patents.
US3250705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing impurities from water at elevated temperatures
Assignee: Union Tank Car Co
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Filing: 1963-03-08
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Granted: 1966-05-10
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Levendusky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:54
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD FOR REMOVING IMPURITIES FROM WATER HAVING A TEMPERATURE IN THE RANGE OF ABOUT 180 TO 450*F., SAID WATER HAVING FREE OXYGEN THEREIN, WHICH COMPRISES REDUCING THE FREE OXYGEN CONTENT OF SAID WATER TO BELOW ABOUT 100 P.P.B. AND PASSING SAID WATER THROUGH ANION EXCHANGE RESIN PARTICLES IN THE HYDROXIDE FORM.
Claim 2
Independent Claim
52 words
A METHOD FOR REMOVING IMPURITIES FROM WATER HAVING A TEMPERATURE IN THE RANGE OF ABOUT 180 TO 450*F., SAID WATER HAVING FREE OXYGEN THEREIN, WHICH COMPRISES REDUCING THE FREE OXYGEN CONTENT OF SAID WATER TO BELOW ABOUT 100 P.P.B. AND PASSING SAID WATER THROUGH ANION EXCHANGE RESIN PARTICLES IN THE HYDROXIDE FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |