Patent US4400441A successfully refreshed from Google Patents.
US4400441A
Expired / Lapsed
US
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Electrographic coating containing aqueous emulsion copolymerized acrylamide copolymers
Assignee: Rohm and Haas Co
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Filing: 1981-07-23
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Granted: 1983-08-23
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Expires: 2001-07-23
Abstract
Abstract Electrically conductive paper is coated with an insulating coating which is an aqueous latex of an aqueous emulsion copolymer of monoethylenically unsaturated monomers comprising from 5% to 40% of copolymerized acrylamide or a monoethylenic derivative thereof, preferably isobutoxymethyl acrylamide. A proportion of monoethylenically unsaturated carboxylic acid is preferably included in the copolymer.
Inventors
- 👤 Ralph L. Minnis
- 👤 Frank J. Ragas
- 👤 Gerson E. Beauchamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:17
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0217; G03G5/0205; G03G5/0208; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
Electrically conductive paper coated with an insulating coating comprising an aqueous emulsion copolymer of monoethylenically unsaturated monomers comprising from 5% to 40% of copolymerized acrylamide or a monoethylenic derivative thereof.
Claim 2
Dependent Claim
30 words
Electrically conductive paper coated with an insulating coating comprising an aqueous emulsion copolymer of monoethylenically unsaturated monomers comprising from 5% to 40% of copolymerized acrylamide or a monoethylenic derivative thereof.
Claim 3
Dependent Claim
20 words
Conductive paper as recited in claim 1 in which said copolymer comprises from 5% to 40% of copolymerized isobutoxymethyl acrylamide.
Claim 4
Dependent Claim
24 words
Conductive paper as recited in claims 1 or 2 in which said copolymer includes from 1% to 10% of copolymerized monoethylenically unsaturated carboxylic acid.
Claim 5
Dependent Claim
14 words
Conductive paper as recited in claim 1 in which said insulating coating is pigmented.
Claim 6
Dependent Claim
14 words
Conductive paper as recited in claim 4 in which said pigment is calcium carbonate.
Claim 7
Dependent Claim
27 words
Conductive paper as recited in claims 4 or 5 in which said pigment is present in a pigment to binder weight ratio of from 2:1 to 6:1.
Claim 8
Dependent Claim
20 words
Conductive paper as recited in claim 6 in which said copolymer comprises from 7% to 30% of copolymerized isobutoxymethyl acrylamide.
Claim 9
Dependent Claim
20 words
Conductive paper as recited in claim 7 in which the copolymer contains at least about 30% of copolymerized methyl methacrylate.
Claim 10
Dependent Claim
23 words
Conductive paper as recited in claim 8 in which said copolymer also contains from 3% to 20% of copolymerized hydroxy functional monoethylenic monomer.
Claim 11
Dependent Claim
16 words
Conductive paper as recited in claim 9 in which said hydroxy functional monomer is 2-hydroxyethyl methacrylate.
References Cited (Backward Citations)
US4098987A
Cited
US4321176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |