US3387430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrochloric acid process
Assignee: Falls Industries Inc
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Filing: 1965-05-07
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Granted: 1968-06-11
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 George Sarvadi Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:32
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/07; C01B7/0706; C01B7/0731; C01B7/0737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PROCESS FOR THE PRODUCTION OF CONCENTRATED HYDROCHLORIC ACID COMPRISING A FIRST ABSORPTION STEP OF ABSORBING BY A DILUTE AQUEOUS SOLUTION OF HYDROCHLORIC ACID IN AN AQUEOUS ABSORBER WHILE COOLING THE SAME, THE HYDROGEN CHLORIDE FROM AN INITIAL HYDROGEN CHLORIDE GAS STREAM CONTAINING A SUBSTANTIAL AMOUNT OF CHLORINATED ORGANIC CONTAMINANTS HAVING A BOILING POINT OF AT LEAST APPROXIMAELY 75*C. AND A SECOND ABSORPTIN STEP OF ABSORBING BY WATER THE HYDROGEN CHLORIDE AHD EFFLUENT GAS STREAM FROM SAID FIRST ABSORPTION STEP, THE IMPROVEMENT COMPRISING REDUCING THE PARTIAL PRESSURE OF SAID CON-
Claim 2
Dependent Claim
91 words
IN A PROCESS FOR THE PRODUCTION OF CONCENTRATED HYDROCHLORIC ACID COMPRISING A FIRST ABSORPTION STEP OF ABSORBING BY A DILUTE AQUEOUS SOLUTION OF HYDROCHLORIC ACID IN AN AQUEOUS ABSORBER WHILE COOLING THE SAME, THE HYDROGEN CHLORIDE FROM AN INITIAL HYDROGEN CHLORIDE GAS STREAM CONTAINING A SUBSTANTIAL AMOUNT OF CHLORINATED ORGANIC CONTAMINANTS HAVING A BOILING POINT OF AT LEAST APPROXIMAELY 75*C. AND A SECOND ABSORPTIN STEP OF ABSORBING BY WATER THE HYDROGEN CHLORIDE AHD EFFLUENT GAS STREAM FROM SAID FIRST ABSORPTION STEP, THE IMPROVEMENT COMPRISING REDUCING THE PARTIAL PRESSURE OF SAID CON-
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |