Patent US3250704A successfully refreshed from Google Patents.
US3250704A
Expired / Lapsed
US
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Method for removing impurities from water streams
Assignee: Union Tank Car Co
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Filing: 1963-11-12
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Granted: 1966-05-10
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Levendusky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B01; B01J; B01J47/00; B01J47/12; B01J47/133; C; C02; C02F; C02F1/00; C02F1/42; B03D1/006; B03D1/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF REMOVING IMPURITIES FROM STEAM CONDENSATE WATER WHICH COMPRISES FORMING A CONDENSATE WATER SLURRY OF A MIXTURE OF ANION AND CATION EXCHANGE RESIN PARTICLES IN SIZE RANGE OF ABOUT 60 TO 400 MESH, SAID MIXTURE OF ANION AND CATION EXCHANGE RESIN PARTICLES NORMALLY HAVING A VOLUME INCREASE GREATER THAN ABOUT 550% IN SAID CONDENSATE WATER, ADDING TO SAID SLURRY A WATERSOLUBLE RESINOUS POLYELECTROLYTE IN SUFFICIENT AMOUNT TO PREVENT SAID VOLUME INCREASE FROM EXCEEDING ABOUT 550% WHILE ALLOWING SAID RESIN PARTICLE MIXTURE TO HAVE A VOLUME INCREASE GREATER THAN ABOUT 100%, PRE-COATING A FILTER SCREEN WITH SAID RESIN PARTICLE MIXTURE BY CIRCULATING
Claim 2
Independent Claim
103 words
THE METHOD OF REMOVING IMPURITIES FROM STEAM CONDENSATE WATER WHICH COMPRISES FORMING A CONDENSATE WATER SLURRY OF A MIXTURE OF ANION AND CATION EXCHANGE RESIN PARTICLES IN SIZE RANGE OF ABOUT 60 TO 400 MESH, SAID MIXTURE OF ANION AND CATION EXCHANGE RESIN PARTICLES NORMALLY HAVING A VOLUME INCREASE GREATER THAN ABOUT 550% IN SAID CONDENSATE WATER, ADDING TO SAID SLURRY A WATERSOLUBLE RESINOUS POLYELECTROLYTE IN SUFFICIENT AMOUNT TO PREVENT SAID VOLUME INCREASE FROM EXCEEDING ABOUT 550% WHILE ALLOWING SAID RESIN PARTICLE MIXTURE TO HAVE A VOLUME INCREASE GREATER THAN ABOUT 100%, PRE-COATING A FILTER SCREEN WITH SAID RESIN PARTICLE MIXTURE BY CIRCULATING
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 |