US2819962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sintered plates for galvanic cells
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1954-03-12
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Granted: 1958-01-14
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Expires: 1974-03-12
Abstract
No abstract record available.
Inventors
- 👤 Salauze Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:12
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; H01M4/04; H01M4/24; H01M4/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD OF PRODUCING SINTERED PLATES FOR GALVANIC CELLS, COMPRISING THE STEPS OF PREPARING AN AQUEOUS HOMOGENEOUS SUSPENSION CONSISTING SOLELY OF WATER, A VISCOSITY INCREASING AGENT DISSOLVED THEREIN AND OF FIBROUS IRON-NICKEL GROUP METALLIC POWDER HAVING INTERLACING PROPERTIES AND DERIVED FROM THE THERMAL DECOMPOSITION OF CORRESPONDING METAL CARBONYL, MAINTAINING THE SUSPENSION QUIESCENT, PASSING A PERFORATED METALLIC BAND THROUGH THE QUIESCENT SUSPENSION TO COAT BOTH FACES OF THE BAND AND FILL ITS PERFORATIONS, THEREAFTER DOCTORING THE THICKNESS OF THE COATINGS RETAINED ON THE BAND AS A RESULT OF ITS PASSAGE THROUGH SAID SUSPENSION, PASSING THE DOCTORED, COATED BAND THROUGH A HEATING ZONE TO DRY THE COATINGS AND THEN SUBJECTING THE BAND WITH ITS DRIED COATINGS TO SINTERING HEAT IN A NON-OXIDIZING ATMOSPHERE, SAID COATING, DOCTORING, DRYING AND SINTERING STEPS BEING EFFECTED AS A CONTINUOUS SEQUENTIAL OPERATION, AND THEREAFTER CUTTING THE BAND INTO REQUIRED DEMENSIONS.
Claim 2
Independent Claim
143 words
A METHOD OF PRODUCING SINTERED PLATES FOR GALVANIC CELLS, COMPRISING THE STEPS OF PREPARING AN AQUEOUS HOMOGENEOUS SUSPENSION CONSISTING SOLELY OF WATER, A VISCOSITY INCREASING AGENT DISSOLVED THEREIN AND OF FIBROUS IRON-NICKEL GROUP METALLIC POWDER HAVING INTERLACING PROPERTIES AND DERIVED FROM THE THERMAL DECOMPOSITION OF CORRESPONDING METAL CARBONYL, MAINTAINING THE SUSPENSION QUIESCENT, PASSING A PERFORATED METALLIC BAND THROUGH THE QUIESCENT SUSPENSION TO COAT BOTH FACES OF THE BAND AND FILL ITS PERFORATIONS, THEREAFTER DOCTORING THE THICKNESS OF THE COATINGS RETAINED ON THE BAND AS A RESULT OF ITS PASSAGE THROUGH SAID SUSPENSION, PASSING THE DOCTORED, COATED BAND THROUGH A HEATING ZONE TO DRY THE COATINGS AND THEN SUBJECTING THE BAND WITH ITS DRIED COATINGS TO SINTERING HEAT IN A NON-OXIDIZING ATMOSPHERE, SAID COATING, DOCTORING, DRYING AND SINTERING STEPS BEING EFFECTED AS A CONTINUOUS SEQUENTIAL OPERATION, AND THEREAFTER CUTTING THE BAND INTO REQUIRED DEMENSIONS.
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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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |