Patent US3869364A successfully refreshed from Google Patents.
US3869364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for inhibiting attack on a ferrous anode electrode in an electrodialytic cell
Assignee: PAULINA RIELOFF-TEJEDA (50%)
•
Filing: 1973-01-05
•
Granted: 1975-03-04
•
Expires: 1993-01-05
Abstract
Abstract An electrodialytic cell in which electrochemical corrosion of a ferrous anode electrode is inhibited by including said electrode as a wall portion of an anode electrode chamber, of which another spaced wall portion constitutes a permselective membrane, and by sweeping the anode electrode chamber with a water solution containing a hydroxide of a cation selected from the group consisting of sodium, potassium, lithium, cesium, rubidium and ammonium.
Inventors
- 👤 Alvaro R Tejeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:00
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/52; C; C02; C02F; C02F1/00; C02F1/42; C02F1/46; C02F1/4604; C02F1/469; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2201/4618; C02F2201/46185
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
AN ELECTRODIALYTIC APPRATUS FOR THE TREATMENT OF ELECTROLYTIC FLUIDS, SAID APPARATUS COMPRISING SEVERAL SERIALLY DISPOSED COMPARTMENTS INCLUDING A FIRST END COMPARTMENT HAVING A FERROUS CATHODE ELECTRODE DISPOSED THEREIN, A SECOND END COMPARTMENT SPACED FROM SAID FIRST END COMPARTMENT, SAID COMPARTMENT SPACE FD FROM SAID FIRST END COMPARTMENT, SAID SECOND END COMPARTMENT HAVING A FERROUS ANODE ELECTRODE SAID FIRST END COMPARTMENT AND SAID SECOND END COMPARTMENT, ION PERMESELECTIVE MEMBRANES SEPARATING EACH COMPARTMENT FROM THE COMPARTMENTS IMMEDIATELY ADJACENT THERETO, MEANS FOR INTRODUCING INTO AND REMOVING ELECTROLYTIC FLUID FROM ALL THE INTERMEDIATE COMPARTMENTS, MEANS FOR IMPRESSING A DIRECT ELECTRIC CURRENT ACROSS SAID CATHODE AND SAID ANODE ELECTRODES, AND MEANS FOR CONTINUOUSLY INTRODUCING INTO AND REMOVING AN AQUEOUS CAUSTIC SOLUTION FROM SAID END COMPARTMENTS.
Claim 2
Dependent Claim
120 words
AN ELECTRODIALYTIC APPRATUS FOR THE TREATMENT OF ELECTROLYTIC FLUIDS, SAID APPARATUS COMPRISING SEVERAL SERIALLY DISPOSED COMPARTMENTS INCLUDING A FIRST END COMPARTMENT HAVING A FERROUS CATHODE ELECTRODE DISPOSED THEREIN, A SECOND END COMPARTMENT SPACED FROM SAID FIRST END COMPARTMENT, SAID COMPARTMENT SPACE FD FROM SAID FIRST END COMPARTMENT, SAID SECOND END COMPARTMENT HAVING A FERROUS ANODE ELECTRODE SAID FIRST END COMPARTMENT AND SAID SECOND END COMPARTMENT, ION PERMESELECTIVE MEMBRANES SEPARATING EACH COMPARTMENT FROM THE COMPARTMENTS IMMEDIATELY ADJACENT THERETO, MEANS FOR INTRODUCING INTO AND REMOVING ELECTROLYTIC FLUID FROM ALL THE INTERMEDIATE COMPARTMENTS, MEANS FOR IMPRESSING A DIRECT ELECTRIC CURRENT ACROSS SAID CATHODE AND SAID ANODE ELECTRODES, AND MEANS FOR CONTINUOUSLY INTRODUCING INTO AND REMOVING AN AQUEOUS CAUSTIC SOLUTION FROM SAID END COMPARTMENTS.
Claim 3
Dependent Claim
46 words
An apparatus as set forth in claim 1 wherein a source of aqueous caustic solution is provided external to the compartments and wherein the means continuously introducing into and removing the aqueous caustic solution from the end compartments draws the aqueous caustic solution from said source.
Claim 4
Dependent Claim
45 words
An apparatus as set forth in claim 1 wherein the electrolytic fluid removed from one of the intermediate compartments is an aqueous caustic solution and wherein the means introducing electrolytic fluid into the end compartments draws the aqueous caustic solution from the aforesaid end compartment.
Claim 5
Dependent Claim
30 words
An apparatus as set forth in claim 3 wherein a bed of an ion exchange material is disposed in the intermediate compartment from which the aqueous caustic solution is drawn.
References Cited (Backward Citations)
US3084113A
Cited
US3437580A
Cited
US3544436A
Cited
US3398078A
Cited
US3496081A
Cited
US3686089A
Cited
US3654104A
Cited
US3595768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |