Patent US5085936A successfully refreshed from Google Patents.
US5085936A
Expired / Lapsed
US
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Watermarked paper sheet for use in xerographic imaging processes
Assignee: Arjo Wiggins Fine Papers Ltd
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Filing: 1989-01-10
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Granted: 1992-02-04
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Expires: 2009-01-10
Abstract
Abstract A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5 x 10<1><0> and 5 x 10<1><2> ohms per square and a Bendsten roughness of not more than 300 millilitres, and the reverse side being formed with a watermark.
Inventors
- 👤 Peter T. Herdman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:48
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/24934; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5×10 10 and 5×10 12 ohms per square and a Bendsten roughness of not more than 300 milliliters, and the reverse side being formed with a watermark.
Claim 2
Dependent Claim
65 words
A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5×10 10 and 5×10 12 ohms per square and a Bendsten roughness of not more than 300 milliliters, and the reverse side being formed with a watermark.
Claim 3
Dependent Claim
22 words
A watermarked paper sheet as claimed in claim 1, in which the Bendsten roughness is in the range 160 to 250 milliliters.
Claim 4
Dependent Claim
48 words
A watermarked paper sheet as claimed in claim 1, in which watermarks which are unsymmetrical or in the form of words are applied as a negative image to the reverse side of the sheet so as to present a positive image when viewed from the print receiving side.
Claim 5
Dependent Claim
78 words
A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5×10 10 and 5×10 12 ohms per square and a Bendsten roughness of not more than 300 milliliters, the sheet having a moisture content in the range of 4% to 6%, and the reverse side being formed with a watermark.
Claim 6
Dependent Claim
78 words
A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5×10 10 and 5×10 12 ohms per square and a Bendsten roughness of not more than 300 milliliters, the sheet having a moisture content in the range of 4% to 6%, and the reverse side being formed with a watermark.
Claim 7
Dependent Claim
19 words
A watermarked paper sheet as claimed in claim 4, in which the moisture content is not more than 5.5%.
Claim 8
Dependent Claim
19 words
A watermarked paper sheet as claimed in claim 5, in which the moisture content is not more than 5%.
Claim 9
Dependent Claim
22 words
A watermarked paper sheet as claimed in claim 4, in which the Bendsten roughness is in the range 160 to 250 milliliters.
Claim 10
Dependent Claim
48 words
A watermarked paper sheet as claimed in claim 4, in which watermarks which are unsymmetrical or in the form of words are applied as a negative image to the reverse side of the sheet so as to present a positive image when viewed from the print receiving side.
References Cited (Backward Citations)
US3085898A
Cited
FR2097011A1
Cited
JPS6230079A
Cited
US4600629A
Cited
FR2588583A1
Cited
US4778711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |