US6060108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for revealing hidden watermarks
Assignee: Preservation Technologies LP
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Filing: 1998-08-28
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Granted: 2000-05-09
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Expires: 2018-08-28
Abstract
Abstract A method for temporarily revealing the presence of a watermark on cellulose-based materials. The method comprises applying one of a perfluorocarbon ard hydrofluorocarbon to at least a portion of the cellulose-based material. The method also provides applying a solution containing both perfluorocarbon and hydrofluorocarbon to the cellulose-based material to vary the rate of evaporation of the solution.
Inventors
- 👤 James E. Burd
- 👤 Lee H. Leiner
- 👤 Robert M. Gaydos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:27
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/14; B41M3/142; B41M3/10
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
37 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying one of a perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark.
Claim 2
Independent Claim
37 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying one of a perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said perfluorocarbon is selected from the group consisting of perfluoroalkane, perfluoroamine, and perfluoromorpholine.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said hydrofluorocarbon is hydrofluoroether.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said perfluorocarbon is perfluoroalkane.
Claim 6
Dependent Claim
19 words
The method of claim 4 wherein said perfluoroalkane is selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said watermark is mechanically applied to said cellulose-based material.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein said cellulose-based material is one of paper, textile, and fabric.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein said cellulose-based material is a stamp.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein said applying occurs via spraying.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein said applying occurs via one of rolling, spreading, and brushing.
Claim 12
Dependent Claim
11 words
The method of claim 1 wherein said applying occurs via immersion.
Claim 13
Independent Claim
37 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark.
Claim 14
Independent Claim
37 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark.
Claim 15
Dependent Claim
19 words
The method of claim 12 wherein said perfluorocarbon is selected from the group consisting of perfluoroalkane, perfluoroamine, and perfluorcmorpholine.
Claim 16
Dependent Claim
10 words
The method of claim 12 wherein said hydrofluorocarbon is hydrofluoroether.
Claim 17
Dependent Claim
22 words
The method of claim 12 wherein said perfluorocarbon is perfluoroalkane, said perfluoroalkane selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 18
Dependent Claim
16 words
The method of claim 12 wherein said cellulose-based material is one of paper, textile, and fabric.
Claim 19
Dependent Claim
12 words
The method of claim 12 wherein said cellulose-based material is a stamp.
Claim 20
Dependent Claim
25 words
The method of claim 12 wherein said perfluorocarbon and hydrofluorocarbon are mixed by weight in a range of about 5% perfluorocarbon to about 95% hydrofluorocarbon.
Claim 21
Dependent Claim
15 words
The method of claim 18 wherein said perfluorocarbon is perfluoroalkane and said hydrofluorocarbon is hydrofluoroether.
Claim 22
Dependent Claim
18 words
The method of claim 12 wherein said applying occurs via one of spraying, rolling, spreading, brushing and immersion.
Claim 23
Independent Claim
67 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being present in said solution in an amount greater than 0% by weight, said hydrofluorocarbon being present in said solution in an amount less than 100% by weight.
Claim 24
Independent Claim
67 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being present in said solution in an amount greater than 0% by weight, said hydrofluorocarbon being present in said solution in an amount less than 100% by weight.
Claim 25
Dependent Claim
20 words
The method of claim 21 wherein said perfluorocarbon and said hydrofluorocarbon are present in a weight ratio of about 95:5.
Claim 26
Dependent Claim
20 words
The method of claim 21 wherein said perfluorocarbon and said hydrofluorocarbon are present in a weight ratio of about 50:50.
Claim 27
Dependent Claim
20 words
The method of claim 21 wherein said perfluorocarbon and said hydrofluorocarbon are present in a weight ratio of about 5:95.
Claim 28
Independent Claim
52 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying one of a perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being a perfluoroalkane selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 29
Independent Claim
52 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying one of a perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being a perfluoroalkane selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 30
Independent Claim
52 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being a perfluoroalkane selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 31
Independent Claim
52 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon being a perfluoroalkane selected from the group consisting of perfluorohexane, perfluoroheptane, and perfluorooctane.
Claim 32
Independent Claim
47 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, wherein said perfluorocarbon is perfluoroalkane and said hydrofluorocarbon is hydrofluorether.
Claim 33
Independent Claim
47 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, wherein said perfluorocarbon is perfluoroalkane and said hydrofluorocarbon is hydrofluorether.
Claim 34
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 95% perfluorocarbon to about 5% hydrofluorocarbon.
Claim 35
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 95% perfluorocarbon to about 5% hydrofluorocarbon.
Claim 36
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 50% perfluorocarbon to about 50% hydrofluorocarbon.
Claim 37
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 50% perfluorocarbon to about 50% hydrofluorocarbon.
Claim 38
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 5% perfluorocarbon to about 95% hydrofluorocarbon.
Claim 39
Independent Claim
56 words
A method of treating cellulose-based material having a watermark for revealing said watermark, said method comprising applying a solution of perfluorocarbon and hydrofluorocarbon to at least a portion of said cellulose-based material to temporarily reveal said watermark, said perfluorocarbon and hydrofluorocarbon being mixed by weight in a range of about 5% perfluorocarbon to about 95% hydrofluorocarbon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |