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US4931367A Expired / Lapsed US ⏱️ 0.0 years remaining

Low float technology battery

Assignee: C and D Power Systems Inc
•
Filing: 1988-10-28
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Granted: 1990-06-05
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Expires: 2008-10-28
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Abstract

Abstract In a device for providing stand-by power to an electrical apparatus, such as a telephone switching system, the battery contained therein is maintained at a positive plate polarization of about 20 to 40 millivolts per cell.

Inventors

  • 👤 William B. Brecht
  • 👤 David O. Feder
  • 👤 Joseph M. McAndrews
  • 👤 Allan J. Williamson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 14:14
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061; Y; Y02; Y02E; Y02E60/00; Y02E60/10

Claims Analysis

Total Claims: 51
Claim 1
Independent Claim 32 words
A method of controlling positive plate grid growth in a floated lead-acid electrochemical cell comprising maintaining the cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
Claim 2
Independent Claim 32 words
A method of controlling positive plate grid growth in a floated lead-acid electrochemical cell comprising maintaining the cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
Claim 3
Dependent Claim 10 words
The method of claim 1 wherein the cell is antimony-free.
Claim 4
Dependent Claim 22 words
The method of claim 2 wherein the cell comprises at least one plate whose grid comprises an alloy of lead and calcium.
Claim 5
Dependent Claim 12 words
The method of claim 1 wherein the cell is a wet cell.
Claim 6
Dependent Claim 12 words
The method of claim 1 wherein the cell is a recombinant cell.
Claim 7
Dependent Claim 19 words
The method of claim 3 wherein the cell contains at least one negative plate that is depolarized with platinum.
Claim 8
Dependent Claim 25 words
The method of claim 1 wherein the cell comprises at least one separator between at least one positive plate and at least one negative plate.
Claim 9
Dependent Claim 11 words
The method of claim 7 wherein the separator comprises silica-filled polyethylene.
Claim 10
Dependent Claim 20 words
The method of claim 1 wherein the cell is maintained at a positive plate polarization of about forty (40) millivolts.
Claim 11
Dependent Claim 20 words
The method of claim 1 wherein the cell is maintained at a positive plate polarization of about twenty-five (25) millivolts.
Claim 12
Independent Claim 57 words
A method of prolonging the useful life of a lead acid battery in float comprising at least one electrochemical cell comprising at least one positive plate, at least one negative plate and an electrolyte, the method comprising maintaining the at least one cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
Claim 13
Independent Claim 57 words
A method of prolonging the useful life of a lead acid battery in float comprising at least one electrochemical cell comprising at least one positive plate, at least one negative plate and an electrolyte, the method comprising maintaining the at least one cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
Claim 14
Dependent Claim 10 words
The method of claim 11 wherein the cell is antimony-free.
Claim 15
Dependent Claim 22 words
The method of claim 12 wherein the cell comprises at least one plate whose grid comprises an alloy of lead and calcium.
Claim 16
Dependent Claim 12 words
The method of claim 11 wherein the cell is a wet cell.
Claim 17
Dependent Claim 12 words
The method of claim 11 wherein the cell is a recombinant cell.
Claim 18
Dependent Claim 19 words
The method of claim 13 wherein the cell contains at least one negative plate that is depolarized with platinum.
Claim 19
Dependent Claim 25 words
The method of claim 1 wherein the cell comprises at least one separator between at least one positive plate and at least one negative plate.
Claim 20
Dependent Claim 12 words
The method of claim 17 wherein the separator comprises a silica-filled polyethylene.
Claim 21
Dependent Claim 20 words
The method of claim 11 wherein the cell is maintained at a positive plate polarization of about forty (40) millivolts.
Claim 22
Dependent Claim 20 words
The method of claim 11 wherein the cell is maintained at a positive plate polarization of about twenty-five (25) millivolts.
Claim 23
Dependent Claim 191 words
In a system comprising electrical apparatus and a battery for providing stand-by D.C. voltage for said apparatus in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current said system including: A. rectification means, receiving a conventional (public utility) sixty (60) hertz A.C. voltage for converting said A.C. to D.C. voltage suitable for use by the electrical apparatus; B. an electrical apparatus, receiving said D.C. voltage and using said D.C. voltage for functioning of said apparatus; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that on interruption of D.C. voltage from the rectification means, the string would provide D.C. voltage to the apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells in series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from said rectification means.
Claim 24
Dependent Claim 191 words
In a system comprising electrical apparatus and a battery for providing stand-by D.C. voltage for said apparatus in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current said system including: A. rectification means, receiving a conventional (public utility) sixty (60) hertz A.C. voltage for converting said A.C. to D.C. voltage suitable for use by the electrical apparatus; B. an electrical apparatus, receiving said D.C. voltage and using said D.C. voltage for functioning of said apparatus; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that on interruption of D.C. voltage from the rectification means, the string would provide D.C. voltage to the apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells in series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from said rectification means.
Claim 25
Dependent Claim 10 words
The system of claim 21 wherein the cells are antimony-free.
Claim 26
Dependent Claim 22 words
The system of claim 22 wherein the cells comprise at least one plate whose grid comprises an alloy of lead and calcium.
Claim 27
Dependent Claim 11 words
The system of claim 21 wherein the cells are wet cells.
Claim 28
Dependent Claim 11 words
The system of claim 21 wherein the cells are recombinant cells.
Claim 29
Dependent Claim 19 words
The system of claim 23 wherein the cells contain at least one negative plate that is depolarized with platinum.
Claim 30
Dependent Claim 25 words
The system of claim 21 wherein the cells comprise at least one separator between at least one positive plate and at least one negative plate.
Claim 31
Dependent Claim 11 words
The system of claim 27 wherein the separator comprises silica-filled polyethylene.
Claim 32
Dependent Claim 22 words
The system of claim 21 wherein the cells are maintained at a positive plate polarization of about forty (40) millivolts per cell.
Claim 33
Dependent Claim 22 words
The system of claim 21 wherein the cells are maintained at a positive plate polarization of about twenty-five (25) millivolts per cell.
Claim 34
Dependent Claim 14 words
The system of claim 21 wherein the string comprises twenty-five (25) cells in series.
Claim 35
Dependent Claim 22 words
The system of claim 21 wherein the electrical apparatus operates in a voltage range of about forty-five (45) to about 53.5 volts.
Claim 36
Dependent Claim 212 words
In a telephone switching system, including a battery for providing stand-by D.C. voltage for telephone switching apparatus connected to a telephone communications network in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current apparatus, said switching system including: A. rectification means, receiving a conventional public utility sixty (60) hertz A.C. electrical voltage for converting said A.C. voltage to D.C. voltage of about forty-five (45) to about 53.5 volts; B. a telephone switching apparatus, receiving said D.C. voltage and using said D.C. voltage for providing telephone switching to and as required by a telephone communication network; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that, on interruption of D.C. voltage from the rectification means, the current would provide D.C. voltage to the switching apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells is series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from the rectification means.
Claim 37
Dependent Claim 212 words
In a telephone switching system, including a battery for providing stand-by D.C. voltage for telephone switching apparatus connected to a telephone communications network in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current apparatus, said switching system including: A. rectification means, receiving a conventional public utility sixty (60) hertz A.C. electrical voltage for converting said A.C. voltage to D.C. voltage of about forty-five (45) to about 53.5 volts; B. a telephone switching apparatus, receiving said D.C. voltage and using said D.C. voltage for providing telephone switching to and as required by a telephone communication network; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that, on interruption of D.C. voltage from the rectification means, the current would provide D.C. voltage to the switching apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells is series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from the rectification means.
Claim 38
Dependent Claim 10 words
The system of claim 33 wherein the cells are antimony-free.
Claim 39
Dependent Claim 23 words
The system of claim 34 wherein the cells comprise at least one positive plate whose grid comprises an allow of lead and calcium.
Claim 40
Dependent Claim 11 words
The system of claim 33 wherein the cells are wet cells.
Claim 41
Dependent Claim 11 words
The system of claim 33 wherein the cells are recombinant cells.
Claim 42
Dependent Claim 19 words
The system of claim 35 wherein the cells contain at least one negative plate that is depolarized with platinum.
Claim 43
Dependent Claim 25 words
The system of claim 33 wherein the cells comprise at least one separator between at least one positive plate and at least one negative plate.
Claim 44
Dependent Claim 11 words
The system of claim 39 wherein the separator comprises silica-filled polyethylene.
Claim 45
Dependent Claim 20 words
The system of claim 33 wherein the cells are maintained at a positive plate polarization of about twenty-five (25) millivolts.
Claim 46
Dependent Claim 14 words
The system of claim 33 wherein the battery comprises twenty-five (25) cells in series.
Claim 47
Independent Claim 38 words
A method of controlling positive plate grid growth in a lead-acid battery comprising electrochemical cells connected in series, comprising maintaining the cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell.
Claim 48
Independent Claim 38 words
A method of controlling positive plate grid growth in a lead-acid battery comprising electrochemical cells connected in series, comprising maintaining the cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell.
Claim 49
Dependent Claim 160 words
In a method of providing stand-by power for use by an electrical apparatus in the event of interruption in conventional sixty (60) hertz A.C. public utility electrical current service, including: A. continuously rectifying by a rectifying means said A.C. voltage to D.C. voltage suitable for use by the electrical apparatus. B. providing said D.C. voltage resulting from continuous rectification to said electrical apparatus; C. positioning a battery containing lead-acid electrochemical cells, connected in series and said electrical apparatus in parallel across output terminals of the rectifying means; D. positioning said battery and said apparatus such that, on interruption of output from said rectifying means, the battery will provide voltage suitable for use by the electrical apparatus in the same electrical current direction as previously provided by said rectifying means; the improvement comprising E. maintaining said cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell while public utility electrical current is being supplied.
Claim 50
Dependent Claim 160 words
In a method of providing stand-by power for use by an electrical apparatus in the event of interruption in conventional sixty (60) hertz A.C. public utility electrical current service, including: A. continuously rectifying by a rectifying means said A.C. voltage to D.C. voltage suitable for use by the electrical apparatus. B. providing said D.C. voltage resulting from continuous rectification to said electrical apparatus; C. positioning a battery containing lead-acid electrochemical cells, connected in series and said electrical apparatus in parallel across output terminals of the rectifying means; D. positioning said battery and said apparatus such that, on interruption of output from said rectifying means, the battery will provide voltage suitable for use by the electrical apparatus in the same electrical current direction as previously provided by said rectifying means; the improvement comprising E. maintaining said cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell while public utility electrical current is being supplied.
Claim 51
Dependent Claim 14 words
The method of claim 44 wherein the electrical apparatus is a telephone switching apparatus.

References Cited (Backward Citations)

US1846246A Cited
GB403508A Cited
US4401935A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-06-04 1993-12-04 1994-06-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-06-04 1997-12-04 1998-06-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-06-04 2001-12-04 2002-06-05 $7700.00 Window Closed / Lapsed

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