US4377554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation of microaerophilic atmosphere
Assignee: Becton Dickinson and Co
•
Filing: 1981-08-26
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Granted: 1983-03-22
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Expires: 2001-08-26
Abstract
Abstract A gas generating package includes gas producing material present at a stoichiometric amount such that when contacted with water hydrogen is generated at a level sufficient to combine with a portion of the oxygen present in a closed container into which the package is placed. A catalyst for the hydrogen-oxygen reaction is provided exterior of the package. The package also includes a wick treated to permit introduction of water to the gas producing material at a predetermined level and rate.
Inventors
- 👤 Raymond Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
C; C12; C12M; C12M41/00; C12M41/30; C12M41/34; Y; Y10; Y10S; Y10S435/00; Y10S435/801
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A unitary package for generating a microaerophilic atmosphere comprising (a) a flexible sealed package; (b) material in a first compartment of said package for generating hydrogen, said hydrogen generating material being present in a stocihiometric amount sufficient to generate hydrogen to react with from about 20 to about 80 percent of the oxygen of a gas tight container into which the package is inserted. (c) a second compartment in said package for receiving water, said second compartment being in fluid communication with said first compartment by means of a fluid channel; and (d) flow restricting means in said fluid channel for establishing predetermined wet-over and condensation times when said package is broken and water is inserted in said compartment, said wet-over time being from about 1.5 to about 3 minutes and said condensation time being from about 10 to about 60 minutes.
Claim 2
Dependent Claim
142 words
A unitary package for generating a microaerophilic atmosphere comprising (a) a flexible sealed package; (b) material in a first compartment of said package for generating hydrogen, said hydrogen generating material being present in a stocihiometric amount sufficient to generate hydrogen to react with from about 20 to about 80 percent of the oxygen of a gas tight container into which the package is inserted. (c) a second compartment in said package for receiving water, said second compartment being in fluid communication with said first compartment by means of a fluid channel; and (d) flow restricting means in said fluid channel for establishing predetermined wet-over and condensation times when said package is broken and water is inserted in said compartment, said wet-over time being from about 1.5 to about 3 minutes and said condensation time being from about 10 to about 60 minutes.
Claim 3
Dependent Claim
44 words
A package in accordance with claim 1 wherein said package is adapted for use in a 2.5 liter container and wherein said hydrogen generating material is present at a level of from about 0.15 gram to about 0.40 gram, on a sodium borohydride basis.
Claim 4
Dependent Claim
31 words
A package in accordance with claim 2 wherein said hydrogen generating material is present at a level of from about 0.20 gram to about 0.35 gram, on a sodium borohydride basis.
Claim 5
Dependent Claim
15 words
A package in accordance with claim 1 wherein said flow restriction means is filter paper.
Claim 6
Dependent Claim
14 words
A package in accordance with claim 4 wherein said filter paper is Whatman #4.
Claim 7
Dependent Claim
37 words
A package in accordance with either one of claims 1, 4 or 5 wherein said wet-over time is from about 2 to about 2.5 minutes and said condensation time is from about 20 to about 30 minutes.
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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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |