US3617592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming a sintered zinc electrode
Assignee: McDonnell Douglas Corp
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Filing: 1966-04-01
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Granted: 1971-11-02
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Expires: 1986-04-01
Abstract
Abstract Production of a zinc electrode of improved strength and electrical conductivity, produced by compacting a mixture of calcined zinc oxide and zinc oxide, e.g. about 75 percent of the former and about 25 percent of the latter, sintering such compacted mixture at temperatures in excess of about 600* C. generally about 600* to about 1,450* C., and forming a strong ceramiclike zinc electrode.
Inventors
- 👤 Frank C Arrance
- 👤 Carl Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/30; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
The process as defined in claim 1, including the step of first forming said calcined zinc oxide by heating zinc oxide at temperature of about 600* to about 1,800* C.
Claim 2
Dependent Claim
23 words
The process as defined in claim 1, wherein said compacted mixture is sintered at temperature ranging from about 700* to about 1,200* C.
Claim 3
Dependent Claim
83 words
The process as defined in claim 1 which comprises calcining zinc oxide at temperature from about 1,000* to about 1,400* C., forming a mixture of about 75 percent of said calcined zinc oxide and about 25 percent of zinc oxide, by weight, compacting said mixture into a desired electrode shape, sintering said compacted mixture at temperature of about 700* to about 1,200* C. for a period of from about 15 minutes up to about 2 hours, and forming a strong ceramiclike zinc electrode.
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |