US4287306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generation of anaerobic atmosphere
Assignee: Becton Dickinson and Co
•
Filing: 1979-04-02
•
Granted: 1981-09-01
•
Expires: 1999-04-02
Abstract
Abstract A gas generating package includes tablets or other material, which when contacted with water generates both hydrogen and carbon dioxide. A catalyst for the hydrogen-oxygen reaction is applied to the exterior of the package, with the exterior of the package preferably also having applied thereto carbon dioxide and anaerobic indicators. In this manner fresh material is employed during each run requiring an anaerobic atmosphere.
Inventors
- 👤 John H. Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
C; C12; C12M; C12M41/00; C12M41/30; C12M41/34; C12M23/00; C12M23/28; C12Q; C12Q1/00; C12Q1/02; Y; Y10; Y10S; Y10S435/00; Y10S435/801
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A unitary package for generating an anaerobic atmosphere for use in culturing anaerobic microorganisms, characterized by (a) a flexible sealed package; (b) material in said package for generating hydrogen; (c) material in said package for generating carbon dioxide; and (d) a catalyst coated onto the exterior surface of said flexible sealed package; (e) whereby when said package is broken and water is inserted to react with said hydrogen generating material said externally coated catalyst catalyzes the reaction between oxygen outside said package and the said generated hydrogen.
Claim 2
Dependent Claim
87 words
A unitary package for generating an anaerobic atmosphere for use in culturing anaerobic microorganisms, characterized by (a) a flexible sealed package; (b) material in said package for generating hydrogen; (c) material in said package for generating carbon dioxide; and (d) a catalyst coated onto the exterior surface of said flexible sealed package; (e) whereby when said package is broken and water is inserted to react with said hydrogen generating material said externally coated catalyst catalyzes the reaction between oxygen outside said package and the said generated hydrogen.
Claim 3
Dependent Claim
16 words
The package of claim 1, further characterized by (a) said flexible sealed package is metallic foil.
Claim 4
Dependent Claim
21 words
The package of claim 1, further characterized by (a) an anaerobic indicator applied to the exterior of said flexible sealed package.
Claim 5
Dependent Claim
22 words
The package of claim 1, further characterized by (a) a carbon dioxide indicator applied to the exterior of said flexible sealed package.
Claim 6
Dependent Claim
58 words
The package of claim 1, further characterized by (a) a first interior compartment; (b) a second interior compartment; (c) said first interior compartment containing said hydrogen and said carbon dioxide generating materials; (d) said second compartment containing a frangible portion for inserting water; and (e) a porous segment between said first and second compartment causing flow communication therebetween.
Claim 7
Dependent Claim
39 words
The package of claim 1, further characterized by (a) said material for generating carbon dioxide is a water soluble solid carbonate and a water soluble solid acid for providing an acidic pH in the generated gas in said package.
Claim 8
Dependent Claim
17 words
The package of claim 1, further characterized by (a) said material for generating hydrogen is sodium borohydride.
Claim 9
Dependent Claim
24 words
The package of claim 1, further characterized by (a) said coated catalyst is selected from the group consisting of supported palladium and supported platinum.
Claim 10
Dependent Claim
30 words
The package of claim 1, further characterized by said coated catalyst comprising (a) carbon palladium catalyst and wherein said catalyst is coated on said package exterior with Gum of Tragacanth.
Claim 11
Dependent Claim
27 words
The package of claim 9, further characterized by (a) said carbon palladium catalyst being present in said catalyst coating in an amount of at least 0.001 grams.
References Cited (Backward Citations)
US2418175A
Cited
US3246959A
Cited
US3419400A
Cited
US3483089A
Cited
US3652317A
Cited
US3890104A
Cited
US3891509A
Cited
US4003709A
Cited
US4013422A
Cited
US4014748A
Cited
US4023934A
Cited
US4038148A
Cited
US4108728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |