Patent US4551401A successfully refreshed from Google Patents.
US4551401A
Expired / Lapsed
US
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Method of suppressing lead dust
Assignee: PACIFIC DUNLOP GNB Corp A DE CORP
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Filing: 1984-04-13
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Granted: 1985-11-05
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Expires: 2004-04-13
Abstract
Abstract A method of suppressing lead dust generated in the manufacture of pasted lead acid storage battery plates by coating the surface of a pasted battery plate with a solution or a suspension comprising ammonium sulfate, copolymer and water. The resultant water insoluble film is made porous by the simultaneous evolution of ammonia gas produced during the coating process. The porous water insoluble film on the battery plate results in an electric storage battery with a lower internal resistance, than previously disclosed coatings and produces a battery with performance characteristics less inhibited than those made with previously disclosed coatings.
Inventors
- 👤 Frank Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:16
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M4/16; H01M4/20; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
61 words
A method of reducing lead dust generated in the known manufacture of lead-acid storage batteries comprising pasting a supporting grid with a lead paste material and applying to the pasted grid a dust suppressing porous film forming amounts of a coating material comprising: ammonium sulfate; a copolymer emulsion; water; and drying said coating material to result in a water-insoluble porous film.
Claim 2
Independent Claim
61 words
A method of reducing lead dust generated in the known manufacture of lead-acid storage batteries comprising pasting a supporting grid with a lead paste material and applying to the pasted grid a dust suppressing porous film forming amounts of a coating material comprising: ammonium sulfate; a copolymer emulsion; water; and drying said coating material to result in a water-insoluble porous film.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the copolymeric emulsion comprises the following monomeric units: acrylate, styrene and acrylic acid; styrene and butadiene; alpha olefin monomers and vinyl acetate; butyl acrylate, acrylonitrile and methylolacrylamide; butyl acrylate, methacrylate and methacrylic acid.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the copolymeric emulsion is selected from the group consisting of: Vinacryl 7172, Vinamul 6705, Dur O Cryl 620 and Stythemul DL 2519.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the copolymeric emulsion is Vinacryl 7172.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the copolymeric emulsion is Vinamul 6705.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein the copolymeric emulsion is Dur O Cryl 620.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the copolymeric emulsion is Synthemul DL 2519.
Claim 9
Independent Claim
68 words
A method of suppressing lead dust generated in the known manufacture of lead-acid storage batteries comprising applying to a pasted plate an aqueous dispersion of a copolymeric emulsion and ammonium sulfate; said ammonium sulfate reacting with the lead material of the pasted plate to produce gaseous ammonia; drying said pasted plate to result in a substantially lead dust-free pasted plate with a water insoluble copolymeric porous film thereon.
Claim 10
Independent Claim
68 words
A method of suppressing lead dust generated in the known manufacture of lead-acid storage batteries comprising applying to a pasted plate an aqueous dispersion of a copolymeric emulsion and ammonium sulfate; said ammonium sulfate reacting with the lead material of the pasted plate to produce gaseous ammonia; drying said pasted plate to result in a substantially lead dust-free pasted plate with a water insoluble copolymeric porous film thereon.
Claim 11
Dependent Claim
39 words
The method of claim 8 wherein the copolymeric emulsion comprises the following monomeric units: acrylate, styrene and acrylic acid; styrene and butadiene; alpha olefin monomers and vinyl acetate; butyl acrylate, acrylonitrile and methylolacrylamide; butyl acrylate, methacrylate and methacrylic acid.
Claim 12
Dependent Claim
28 words
The method of claim 8 wherein the copolymeric emulsion is selected from the group consisting of: Vinacryl 7172, Vinamul 6705, Dur O Cryl 620 and Synthemul DL 2519.
Claim 13
Dependent Claim
12 words
The method of claim 8 wherein the copolymeric emulsion is Vinacryl 7172.
Claim 14
Dependent Claim
12 words
The method of claim 8 wherein the copolymeric emulsion is Vinamul 6705.
Claim 15
Dependent Claim
14 words
The method of claim 8 wherein the copolymeric emulsion is Dur O Cryl 620.
Claim 16
Dependent Claim
13 words
The method of claim 8 wherein the copolymeric emulsion is Synthemul DL 2519.
Claim 17
Dependent Claim
39 words
A substantially dust free unformed leaded plate for lead acid storage batteries comprising a lead pasted supporting grid coated with a copolymeric water insoluble porous coating made porous by applying a suspension of copolymer emulsion, ammonium sulfate and water.
Claim 18
Dependent Claim
39 words
A substantially dust free unformed leaded plate for lead acid storage batteries comprising a lead pasted supporting grid coated with a copolymeric water insoluble porous coating made porous by applying a suspension of copolymer emulsion, ammonium sulfate and water.
Claim 19
Dependent Claim
40 words
The leaded plate of claim 15 wherein the copolymeric emulsion comprises the following monomeric units: acrylate, styrene and acrylic acid; styrene and butadiene; alpha olefin monomers and vinyl acetate; butyl acrylate, acrylonitrile and methylolacrylamide; butyl acrylate, methacrylate and methacrylic acid.
Claim 20
Dependent Claim
29 words
The leaded plate of claim 15 wherein the copolymeric emulsion is selected from the group consisting of: Vinacryl 7172, Vinamul 6705, Dur O Cryl 620 and Synthemul DL 2519.
Claim 21
Dependent Claim
13 words
The leaded plate of claim 15 wherein the copolymeric emulsion is Vinacryl 7172.
Claim 22
Dependent Claim
13 words
The leaded plate of claim 15 wherein the copolymeric emulsion is Vinamul 6705.
Claim 23
Dependent Claim
15 words
The leaded plate of claim 15 wherein the copolymeric emulsion is Dur O Cryl 620.
Claim 24
Dependent Claim
14 words
The leaded plate of claim 15 wherein the copolymeric emulsion is Synthemul DL 2519.
Claim 25
Dependent Claim
66 words
A composition which reduces lead dust emanating from lead plates during the process of manufacturing lead-acid storage batteries comprising: ammonium sulfate; copolymeric emulsion wherein the monomeric units of the copolymeric emulsion are selected from the group consisting of: acrylate, styrene and acrylic acid; styrene and butadiene; alpha olefin monomers and vinyl acetate; butyl acrylate, acrylonitrile and methylolacrylamide; or butyl acrylate, methacrylate and methacrylic acid; and water.
Claim 26
Dependent Claim
66 words
A composition which reduces lead dust emanating from lead plates during the process of manufacturing lead-acid storage batteries comprising: ammonium sulfate; copolymeric emulsion wherein the monomeric units of the copolymeric emulsion are selected from the group consisting of: acrylate, styrene and acrylic acid; styrene and butadiene; alpha olefin monomers and vinyl acetate; butyl acrylate, acrylonitrile and methylolacrylamide; or butyl acrylate, methacrylate and methacrylic acid; and water.
Claim 27
Dependent Claim
28 words
The composition of claim 22 wherein the copolymeric emulsion is selected from the group consisting of Vinacryl 7172, Vinamul 6705, Dur O Cryl 620 and Synthemul DL 2519.
Claim 28
Dependent Claim
12 words
The composition of claim 22 wherein the copolymer emulsion comprises Vinacryl 7172.
Claim 29
Dependent Claim
12 words
The composition of claim 22 wherein the copolymer emulsion comprises Vinamul 6705.
Claim 30
Dependent Claim
14 words
The composition of claim 22 wherein the copolymer emulsion comprises Dur O Cryl 620.
Claim 31
Dependent Claim
13 words
The composition of claim 22 wherein the copolymer emulsion comprises Synthemul DL 2519.
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |