US2944956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine cell having protected diaphragm
Assignee: Dow Chemical Co
•
Filing: 1956-11-16
•
Granted: 1960-07-12
•
Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Robert D Blue
- 👤 Marshall P Neipert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN AN IMPROVED DIAPHRAGM-TYPE CHLORINE CELL FOR THE ELECTROLYTIC DECOMPOSITION OF A CHLORIDE BRINE IN THE PRODUCTION OF CHLORINE GAS CONTAINING A NON-CONDUCTING DIAPHRAGM WHICH HAS SMALL RESISTANCE AGAINST DISTORTION, PERFORATION, AND DISLODGEMENT FROM POSITION AND WHICH DIVIDES THE CELL INTO AN ANOLYTE COMPARTMENT AND A CHOLYTE COMPARTMENT, THE IMPROVEMENT COMPRISING A SUBSTANTIALLY RIGID SCREEN COMPOSED OF MESHED FILAMENTS POSITIONED PARALLEL TO AND ADJACENT TO SAID DIAPHRAGM FOR THE PROTECHTION OF THE DIAPHRAGM ON THE ANODE SIDE THEREOF, THE FILAMENTS OF SAID SCREEN BEING COATED WITH A PROTECTIVE COATING SELECTED FROM THE GROUP CONSISTING OF POLYMERIZED MONOCHLOROTRIFLUOROETHYLENE AND TETRAFLUOROETHYLENE, AND AN ANODE CONSISTING OF A BODY OF PARTICULATE GRAPHITE OF MINIMUM PARTICLE DIMENSION GREATER THAN THAT OF THE MESHES IN SAID SCREEN COMPACTED IN SAID ANOLYTE COM-
Claim 2
Dependent Claim
127 words
IN AN IMPROVED DIAPHRAGM-TYPE CHLORINE CELL FOR THE ELECTROLYTIC DECOMPOSITION OF A CHLORIDE BRINE IN THE PRODUCTION OF CHLORINE GAS CONTAINING A NON-CONDUCTING DIAPHRAGM WHICH HAS SMALL RESISTANCE AGAINST DISTORTION, PERFORATION, AND DISLODGEMENT FROM POSITION AND WHICH DIVIDES THE CELL INTO AN ANOLYTE COMPARTMENT AND A CHOLYTE COMPARTMENT, THE IMPROVEMENT COMPRISING A SUBSTANTIALLY RIGID SCREEN COMPOSED OF MESHED FILAMENTS POSITIONED PARALLEL TO AND ADJACENT TO SAID DIAPHRAGM FOR THE PROTECHTION OF THE DIAPHRAGM ON THE ANODE SIDE THEREOF, THE FILAMENTS OF SAID SCREEN BEING COATED WITH A PROTECTIVE COATING SELECTED FROM THE GROUP CONSISTING OF POLYMERIZED MONOCHLOROTRIFLUOROETHYLENE AND TETRAFLUOROETHYLENE, AND AN ANODE CONSISTING OF A BODY OF PARTICULATE GRAPHITE OF MINIMUM PARTICLE DIMENSION GREATER THAN THAT OF THE MESHES IN SAID SCREEN COMPACTED IN SAID ANOLYTE COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |