Patent US3963517A successfully refreshed from Google Patents.
US3963517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of lead storage battery electrodes and apparatus for carrying out the process
Assignee: Tudor AB
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Filing: 1974-05-30
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Granted: 1976-06-15
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Expires: 1994-05-30
Abstract
Abstract Greater uniformity of particle size and free-running properties are achieved in the production of granular material for lead storage battery electrodes by adding water or sulfuric acid to a mixture of granules of lead and lead oxide to produce a paste which is pressed through a foraminous body such as a filter cloth and the resulting granules dried by permitting free fall through a heated gaseous drying medium. Novel apparatus for carrying out the process is also disclosed.
Inventors
- 👤 Gunnar Eckerbom
- 👤 Ove Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:17
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/56; H01M4/57; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
A method for producing active granular material for lead storage battery electrodes which comprises forming a paste from a moistened mixture of lead and lead oxide particles, forcing the resulting paste through a foraminous body, an drying the resulting granular material during free fall.
Claim 2
Independent Claim
44 words
A method for producing active granular material for lead storage battery electrodes which comprises forming a paste from a moistened mixture of lead and lead oxide particles, forcing the resulting paste through a foraminous body, an drying the resulting granular material during free fall.
Claim 3
Dependent Claim
18 words
A process as in claim 1 wherein the mixture of lead and lead oxide is moistened with water.
Claim 4
Dependent Claim
23 words
A process as in claim 1 wherein the mixture of lead and lead oxide is moistened with an aqueous solution of sulfuric acid.
Claim 5
Dependent Claim
13 words
A process as in claim 1 wherein drying occurs in a nonoxidizing atmosphere.
Claim 6
Dependent Claim
14 words
A process as in claim 4 wherein the nonoxidizing atmosphere comprises hot combustion gases.
Claim 7
Dependent Claim
17 words
A process as in claim 5 wherein the hot combustion gases contain a maximum of 2% oxygen.
Claim 8
Dependent Claim
19 words
A process as in claim 5 wherein drying takes place at a temperature of about from 350° to 450°C.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |