US2829028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of inorganic fluorides from crude gaseous hydrogen chloride by anion exchange resins
Assignee: EIDP Inc
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Filing: 1955-10-24
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Granted: 1958-04-01
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Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 Charles E Aho
- 👤 William S Murray
- 👤 Sloan Walter John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:18
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C01B7/195; C01B7/197; C01B7/198; B; B01; B01J; B01J41/00; B01J41/04; B01J41/05; C01B7/01; C01B7/07; C01B7/0706; C01B7/0718
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR REDUCING THE CONTENT OF INORGANIC FLUORIDES IN GASEOUS HYDROGEN CHLORIDE WHICH PROCESS COMPRISES PASSING SAID GAS THROUGH A BED OF A STRONGLY BASIC ANION EXCHANGE RESIN AT A FLOW RATE OF 200 TO 700 CU. FT. PER HOUR PER CU. FT. OF THE RESIN, SAID RESIN BEING A COPOLYMER OF CTYRENE AND DIVINYLBENZENE CONTAINING QUATERNARY AMMONIUM GROUPS WHICH HAS BEEN IMPREGNATED AT 0 TO 60*C. WITH AQUEOUS HYDROCHLORIC ACID SATURATED WITH BORIC ACID.
Claim 2
Dependent Claim
76 words
A PROCESS FOR REDUCING THE CONTENT OF INORGANIC FLUORIDES IN GASEOUS HYDROGEN CHLORIDE WHICH PROCESS COMPRISES PASSING SAID GAS THROUGH A BED OF A STRONGLY BASIC ANION EXCHANGE RESIN AT A FLOW RATE OF 200 TO 700 CU. FT. PER HOUR PER CU. FT. OF THE RESIN, SAID RESIN BEING A COPOLYMER OF CTYRENE AND DIVINYLBENZENE CONTAINING QUATERNARY AMMONIUM GROUPS WHICH HAS BEEN IMPREGNATED AT 0 TO 60*C. WITH AQUEOUS HYDROCHLORIC ACID SATURATED WITH BORIC ACID.
References Cited (Backward Citations)
US2526777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |