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US5260023A
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US
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System and method for preserving acid-containing articles
Assignee: Everseal Preservation Labs Inc
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Filing: 1992-07-27
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Granted: 1993-11-09
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Expires: 2012-07-27
Abstract
Abstract An article preservation system and method includes an acid-containing article which is contacted with an alkaline substrate material and an artificial atmosphere which is substantially free of gaseous oxygen. The article, alkaline substrate material and artificial atmosphere are hermetically sealed, along with an oxygen-absorbing material, within an interior of a container.
Inventors
- 👤 II Creed M. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:35
CPC Classifications
A; A47; A47G; A47G1/00; A47G1/06; A47G1/0616; B; B65; B65D; B65D79/00; B65D79/02; B65D81/00; B65D81/24; D; D21; D21H; D21H25/00; D21H25/18
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
52 words
An article preservation system, comprising an oxygen-absorbing material and an acid-containing article, which article is in contact with an alkaline substrate material and a gaseous atmosphere which is substantially free of gaseous oxygen; the article, alkaline substrate material, oxygen-absorbing material and gaseous atmosphere being hermetically sealed within an interior of a container.
Claim 2
Dependent Claim
52 words
An article preservation system, comprising an oxygen-absorbing material and an acid-containing article, which article is in contact with an alkaline substrate material and a gaseous atmosphere which is substantially free of gaseous oxygen; the article, alkaline substrate material, oxygen-absorbing material and gaseous atmosphere being hermetically sealed within an interior of a container.
Claim 3
Dependent Claim
30 words
The system of claim 1 wherein at least a portion of said container is at least partially transparent so as to permit viewing of the article from outside the container.
Claim 4
Dependent Claim
16 words
The system of claim 1 further including a desiccant sealed within the interior of said container.
Claim 5
Dependent Claim
30 words
The system of claim 3 wherein at least a portion of said container is at least partially transparent so as to permit viewing of the article from outside the container.
Claim 6
Dependent Claim
12 words
The system of claim 4 wherein said article is a paper document.
Claim 7
Dependent Claim
23 words
The system of claim 5 wherein the container is formed of substantially transparent polymer sheet material which is substantially impervious to gaseous oxygen.
Claim 8
Dependent Claim
23 words
The system of claim 6 wherein the polymer sheet material comprises an inner copolyester layer and an outer layer of PVDC sheet material.
Claim 9
Dependent Claim
20 words
The system of claim 6 wherein said sheet comprises polymeric sheet material on which is applied an oxygen barrier coating.
Claim 10
Dependent Claim
14 words
The system of claim 6 wherein the polymer sheet material includes a UV blocker.
Claim 11
Dependent Claim
16 words
The system of claim 5 wherein said substrate is alkaline paper comprising calcium carbonate and cellulose.
Claim 12
Dependent Claim
19 words
The system of claim 10 wherein said substrate comprises about 30% calcium carbonate, and about 70% cellulose and alkalies.
Claim 13
Dependent Claim
23 words
The system of claim 5 wherein said gaseous atmosphere includes inert gas selected from the group consisting of argon, helium and mixtures thereof.
Claim 14
Dependent Claim
17 words
The system of claim 12 wherein the artificial atmosphere comprises about 70% argon and about 30% helium.
Claim 15
Dependent Claim
29 words
The system of claim 1 further including an O 2 indicator sealed within the interior of said container, capable of indicating the presence of gaseous oxygen within said interior.
Claim 16
Dependent Claim
34 words
The system of claim 14 wherein said O 2 indicator is capable of indicating an O 2 content in the atmosphere of the interior of said container of about 0.5% O 2 or higher.
Claim 17
Dependent Claim
25 words
The system of claim 3 further including a pH indicator within the interior of said container capable of indicating when said substrate material becomes acidic.
Claim 18
Independent Claim
49 words
A method of preserving an acid-containing article, comprising contacting the article with an alkaline substrate material and a gaseous atmosphere which is substantially free of gaseous oxygen, providing an oxygen-absorbing material, and sealing the article, alkaline substrate material, oxygen-absorbing material and gaseous atmosphere within an interior of a container.
Claim 19
Independent Claim
49 words
A method of preserving an acid-containing article, comprising contacting the article with an alkaline substrate material and a gaseous atmosphere which is substantially free of gaseous oxygen, providing an oxygen-absorbing material, and sealing the article, alkaline substrate material, oxygen-absorbing material and gaseous atmosphere within an interior of a container.
Claim 20
Dependent Claim
27 words
The method of claim 17 wherein at least a portion of said container is transparent so as so permit viewing of the article from outside the container.
Claim 21
Dependent Claim
24 words
The method of claim 17 further comprising the step of providing a desiccant, wherein said desiccant is sealed within the interior of said container.
Claim 22
Dependent Claim
27 words
The method of claim 19 wherein at least a portion of said container is transparent so as so permit viewing of the article from outside the container.
Claim 23
Dependent Claim
21 words
The method of claim 20 wherein the article contacted with said substrate and sealed in said container comprises a paper document.
Claim 24
Dependent Claim
14 words
The method of claim 18 wherein said container is substantially impervious to gaseous oxygen.
Claim 25
Dependent Claim
18 words
The method of claim 22 wherein the sealing step includes sealing an O 2 indicator within said container.
Claim 26
Dependent Claim
17 words
The method of claim 19 wherein the sealing step includes sealing a pH indicator within said container.
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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) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |