Patent US2105487A successfully refreshed from Google Patents.
Patent US2749306A successfully refreshed from Google Patents.
US2749306A
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Method for treating cation exchange material and cation exchange material resulting therefrom
Assignee: Victor Chemical Works
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Filing: 1952-05-03
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Granted: 1956-06-05
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Expires: 1972-05-03
Abstract
No abstract record available.
Inventors
- 👤 William B Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/50; B01J49/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF TREATING A WATER SOFTENING ION EXCHANGE MATERIAL TO REMOVE IRON SALTS DEPOSITS THEREON WHICH COMPRISES CONTACTING THE MATERIAL WITH AN ESSENTIALLY BRINE-FREE WATER SOLUTION OF A PHOSPHATE SALT, WHEREIN THE PHOSPHATE SALT IS A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL PYROPHOSPHATES, ALKALI METAL POLYPHOSPHATES ALKALI METAL METAPHOSPHATES, ACID PHOSPHATES AND MIXTURES THEREOF, WHOSE METAL IONS IS TO BE SUBSTITUTED IN THE EXCHANGE MATERIAL, THE PHOSPHATE BEING CAPABLE OF SEQUESTERING FERRIC IONS AND HAVING A PH OF ABOUT 4.0 TO ABOUT 10.5.
Claim 2
Independent Claim
86 words
THE METHOD OF TREATING A WATER SOFTENING ION EXCHANGE MATERIAL TO REMOVE IRON SALTS DEPOSITS THEREON WHICH COMPRISES CONTACTING THE MATERIAL WITH AN ESSENTIALLY BRINE-FREE WATER SOLUTION OF A PHOSPHATE SALT, WHEREIN THE PHOSPHATE SALT IS A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL PYROPHOSPHATES, ALKALI METAL POLYPHOSPHATES ALKALI METAL METAPHOSPHATES, ACID PHOSPHATES AND MIXTURES THEREOF, WHOSE METAL IONS IS TO BE SUBSTITUTED IN THE EXCHANGE MATERIAL, THE PHOSPHATE BEING CAPABLE OF SEQUESTERING FERRIC IONS AND HAVING A PH OF ABOUT 4.0 TO ABOUT 10.5.
References Cited (Backward Citations)
US1965339A
Cited
US2351160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |