US4920020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc powder for alkaline batteries
Assignee: SA ACEC-UNION MINIERE NV A Co UNDER LAW OF BELGIUM
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Filing: 1989-01-04
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Granted: 1990-04-24
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Expires: 2009-01-04
Abstract
Abstract A zinc base powder for alkaline batteries consists of 0.05 to 3% of mercury, 0.003 to 0.2% of bismuth, 0.01 to 0.08% of lead, the rest being zinc. This powder has an excellent resistance to corrosion in alkaline medium.
Inventors
- 👤 Ivan A. Strauven
- 👤 Marcel L. Meeus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:46
CPC Classifications
C; C22; C22C; C22C18/00; H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/42; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
28 words
A zinc base powder for alkaline batteries consisting of 0.05 to 3% of mercury, 0.003 to 0.045% of bismuth, 0.01 to 0.08% of lead, the rest being zinc.
Claim 2
Dependent Claim
28 words
A zinc base powder for alkaline batteries consisting of 0.05 to 3% of mercury, 0.003 to 0.045% of bismuth, 0.01 to 0.08% of lead, the rest being zinc.
Claim 3
Dependent Claim
14 words
A powder according to claim 1 which contains from 0.03 to 0.06% of lead.
Claim 4
Dependent Claim
14 words
A powder according to claim 1 which contains from 1.3 to 1.7% of mercury.
Claim 5
Dependent Claim
14 words
A powder according to claim 3 which contains from 0.03 to 0.06% of lead.
Claim 6
Dependent Claim
14 words
A powder according to claim 1 which contains from 0.1 to 3% of mercury.
Claim 7
Dependent Claim
14 words
A powder according to claim 5 which contains from 0.03 to 0.06% of lead.
Claim 8
Dependent Claim
14 words
A powder according to claim 1 which contains from 0.025 to 0.045% of bismuth.
Claim 9
Dependent Claim
14 words
A powder according to claim 7 which contains from 0.03 to 0.06% of lead.
Claim 10
Dependent Claim
14 words
A powder according to claim 7 which contains from 0.1 to 3% of mercury.
Claim 11
Dependent Claim
14 words
A powder according to claim 9 which contains from 0.03 to 0.06% of lead.
Claim 12
Dependent Claim
14 words
A powder according to claim 7 which contains from 1.3 to 1.7% of mercury.
Claim 13
Dependent Claim
14 words
A powder according to claim 11 which contains from 0.03 to 0.06% of lead.
Claim 14
Dependent Claim
29 words
An alkaline battery containing a zinc base powder consisting of 0.05 to 3% of mercury, 0.003 to 0.045% of bismuth, 0.01 to 0.08% of lead, the rest being zinc.
Claim 15
Dependent Claim
29 words
An alkaline battery containing a zinc base powder consisting of 0.05 to 3% of mercury, 0.003 to 0.045% of bismuth, 0.01 to 0.08% of lead, the rest being zinc.
Claim 16
Dependent Claim
17 words
A battery containing a powder according to claim 13 which contains from 0.03 to 0.06% of lead.
Claim 17
Dependent Claim
17 words
A battery containing a powder according to claim 13 which contains from 1.3 to 1.7% of mercury.
Claim 18
Dependent Claim
17 words
A battery containing a powder according to claim 15 which contains from 0.03 to 0.06% of lead.
Claim 19
Dependent Claim
17 words
A battery containing a powder according to claim 13 which contains from 0.1 to 3% of mercury.
Claim 20
Dependent Claim
17 words
A battery containing a powder according to claim 17 which contains from 0.03 to 0.06% of lead.
Claim 21
Dependent Claim
17 words
A battery containing a powder according to claim 13 which contains from 0.025 to 0.045% of bismuth.
Claim 22
Dependent Claim
17 words
A battery containing a powder according to claim 19 which contains from 0.03 to 0.06% of lead.
Claim 23
Dependent Claim
17 words
A battery containing a powder according to claim 19 which contains from 0.1 to 3% of mercury.
Claim 24
Dependent Claim
17 words
A battery containing a powder according to claim 21 which contains from 0.03 to 0.06% of lead.
Claim 25
Dependent Claim
17 words
A battery containing a powder according to claim 19 which contains from 1.3 to 1.7% of mercury.
Claim 26
Dependent Claim
17 words
A battery containing a powder according to claim 23 which contains from 0.03 to 0.06% of lead.
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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |