US2977401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathodes
Assignee: Union Carbide Corp
•
Filing: 1957-10-09
•
Granted: 1961-03-28
•
Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 Paul A Marsal
- 👤 Lewis F Urry
- 👤 Tasch Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/624; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A SELF-SUPPORTING SHAPED DRY CELL CATHODE COMPRISING FINELY DIVIDED OXIDIC DEPOLARIZER MATERIAL, FINELY DIVIDED CARBONCEOUS PARTICLES THE WEIGHT RATIO OF DEPOLARIZER TO CARBONACEOUS PARTICLES RANGING FROM 2 TO 1 TO 26 TO 1, FROM 5 TO 2/ WEIGHT PERCENT OF AN ALKALINE ELECTROLYTE, AND FROM 2 TO 30 WEIGHT PERCENT ELECTRICALLY CONDUCTIVE FILAMENTARY MATERIALS STABLE IN THE CATHODE ENVIRONMENT, THE LENGTH OF SAID FILAMENTARY MATERIALS RANGING FROM ABOUT 1/16 TO ABOUT 1/2 INCH, THE DIAMETER OF SAID FILAMENTARY MATERIALS RANGING FROM ABOUT 0.0005 TO 0.010 INCH, SAID FILAMENTARY MATERIALS BEING PRESENT IN AN AMOUNT SUFFICIENT TO MATERIALLY ENHANCE THE INTEGRITY OF SAID SHAPED CATHODE AND DIMINISH ITS ELECTRICAL RESISTANCE, SAID AMOUNT BEING LESSER BOTH IN WEIGHT AND BULK THAN SAID OXIDIC DEPOLARIZER MATERIAL.
Claim 2
Dependent Claim
123 words
A SELF-SUPPORTING SHAPED DRY CELL CATHODE COMPRISING FINELY DIVIDED OXIDIC DEPOLARIZER MATERIAL, FINELY DIVIDED CARBONCEOUS PARTICLES THE WEIGHT RATIO OF DEPOLARIZER TO CARBONACEOUS PARTICLES RANGING FROM 2 TO 1 TO 26 TO 1, FROM 5 TO 2/ WEIGHT PERCENT OF AN ALKALINE ELECTROLYTE, AND FROM 2 TO 30 WEIGHT PERCENT ELECTRICALLY CONDUCTIVE FILAMENTARY MATERIALS STABLE IN THE CATHODE ENVIRONMENT, THE LENGTH OF SAID FILAMENTARY MATERIALS RANGING FROM ABOUT 1/16 TO ABOUT 1/2 INCH, THE DIAMETER OF SAID FILAMENTARY MATERIALS RANGING FROM ABOUT 0.0005 TO 0.010 INCH, SAID FILAMENTARY MATERIALS BEING PRESENT IN AN AMOUNT SUFFICIENT TO MATERIALLY ENHANCE THE INTEGRITY OF SAID SHAPED CATHODE AND DIMINISH ITS ELECTRICAL RESISTANCE, SAID AMOUNT BEING LESSER BOTH IN WEIGHT AND BULK THAN SAID OXIDIC DEPOLARIZER MATERIAL.
References Cited (Backward Citations)
US1104898A
Cited
US793077A
Cited
US2616165A
Cited
US2542576A
Cited
US2794845A
Cited
US2713078A
Cited
US2810008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |