Patent US4218527A successfully refreshed from Google Patents.
US4218527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead dioxide/fluoride-containing cathodes for solid electrolyte cells
Assignee: Edgewell Personal Care Brands LLC
•
Filing: 1979-03-30
•
Granted: 1980-08-19
•
Expires: 1999-03-30
Abstract
Abstract A cathode for use in solid electrolyte cells comprising a mixture of water-containing lead dioxide and a metal fluoride.
Inventors
- 👤 Geoffrey W. Mellors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:53
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/362; H01M4/364; H01M6/00; H01M6/14; H01M6/18; H01M6/182; H01M6/183; H01M2004/026; H01M2004/028; H01M4/48; H01M4/56; H01M4/58; H01M4/582
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
a cathode for use in an electrochemical cell comprising a mixture of lead dioxide (PbO 2 ) having a water content of between about 0.4 and about 10 percent by weight with a metal fluoride in a mole ratio of between about 3:1 and about 1:3.
Claim 2
Dependent Claim
46 words
a cathode for use in an electrochemical cell comprising a mixture of lead dioxide (PbO 2 ) having a water content of between about 0.4 and about 10 percent by weight with a metal fluoride in a mole ratio of between about 3:1 and about 1:3.
Claim 3
Dependent Claim
12 words
The cathode of claim 1 wherein the mole ratio is about 1:1.
Claim 4
Dependent Claim
23 words
The cathode of claim 1 wherein the lead dioxide has a water content of between about 3 and about 6 percent by weight.
Claim 5
Dependent Claim
72 words
The cathode of claim 1 wherein the metal fluoride is selected from the group consisting of cobaltic trifluoride (CoF 3 ), lead trifluoride (PbF 3 ), manganese trifluoride (MnF 3 ), tantalum pentafluoride (TaF 5 ), niobium pentafluoride (NbF 5 ), mercuric fluoride (HgF 2 ), mercurous fluoride (Hg 2 F 2 ), cupric fluoride (CuF 2 ), argentous fluoride (AgF), argentic fluoride (AgF 2 ) and bismuth trifluoride (BiF 3 ).
Claim 6
Dependent Claim
10 words
A solid electrolyte cell employing the cathode of claim 1.
Claim 7
Dependent Claim
13 words
The solid electrolyte cell of claim 5 employing a lead fluoride-based solid electrolyte.
Claim 8
Dependent Claim
21 words
The solid electrolyte cell of claim 6 wherein a portion of the lead fluoride-based solid electrolyte is incorporated into the cathode.
Claim 9
Dependent Claim
62 words
The solid electrolyte cell of claim 5 employing a solid electrolyte selected from the group consisting of 88PbF 2 -8SrF 2 -4KF, 86PbF 2 -10BaF 2 -4KF, 94PbF 2 -3CaF 2 -3KF, 95PbF 2 -2CaF 2 -3KF, 50PbF 2 -50SnF 2 and 90PbF 2 -5SnF 2 -5KF and an anode selected from the group consisting of lead, lead-coated substrates and lead alloys.
Claim 10
Dependent Claim
18 words
The solid electrolyte cell of claim 8 wherein a lead fluoride-based solid electrolyte is incorporated into the cathode.
Claim 11
Dependent Claim
20 words
The solid electrolyte cell of claim 5 employing a 88PbF 2 -8SrF 2 -4KF solid electrolyte and a lead anode.
Claim 12
Dependent Claim
19 words
The solid electrolyte cell of claim 5 employing a 50PbF 2 -50SnF 2 solid electrolyte and a lead anode.
Claim 13
Dependent Claim
20 words
The solid electrolyte cell of claim 5 employing a 86PbF 2 -10BaF 2 -4KF solid electrolyte and a lead anode.
Claim 14
Dependent Claim
20 words
The solid electrolyte cell of claim 5 employing a 94PbF 2 -3CaF 2 -3KF solid electrolyte and a lead anode.
References Cited (Backward Citations)
US3455742A
Cited
US3709734A
Cited
US3778310A
Cited
US3973990A
Cited
US4079174A
Cited
US4071655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |