US4687640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine gas filtering material suitable for use in a chemical oxygen generator
Assignee: Avox Systems Inc
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Filing: 1985-11-08
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Granted: 1987-08-18
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Expires: 2005-11-08
Abstract
Abstract A chlorine gas filtering material suitable for use in a high temperature oxygen environment, and a method of making the filtering material. The filtering material is prepared by impregnating a porous manganese dioxide and copper oxide hopcalite catalyst prepared by the carbonate method with sodium hydroxide. The process of making includes the steps of mixing the catalyst into a sodium hydroxide solution and then vacuum baking the impregnated catalyst for at least 8 hours, and preferably for 16 hours at a temperature of 240° F.-260° F.
Inventors
- 👤 Samuel P. Schillaci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
A; A62; A62D; A62D9/00; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0296
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A chemical oxygen generator comprising: a housing including a shell, an ignition head assembly and a discharge head assembly; a chlorate candle core disposed within the shell; and filtering material disposed between the core and the shell, said filtering material including a chlorine getter consisting of a vacuum baked high surface area carbonate method hopcalite impregnated with a hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 2
Dependent Claim
70 words
A chemical oxygen generator comprising: a housing including a shell, an ignition head assembly and a discharge head assembly; a chlorate candle core disposed within the shell; and filtering material disposed between the core and the shell, said filtering material including a chlorine getter consisting of a vacuum baked high surface area carbonate method hopcalite impregnated with a hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 3
Dependent Claim
52 words
The chemical oxygen generator as set forth in claim 1 further comprising a bowl and an apertured sleeve disposed within the shell in axial abutting relationship, insulating material disposed between the chlorate candle core and the bowl and sleeve, and wherein the filtering material is disposed between the bowl and the shell.
Claim 4
Dependent Claim
20 words
The chemical oxygen generator as set forth in claim 2 wherein the bowl is disposed adjacent the discharge head assembly.
Claim 5
Dependent Claim
19 words
The chemical oxygen generator as set forth in claim 1 wherein the filtering material further includes a particulate filter.
Claim 6
Dependent Claim
30 words
The chemical oxygen generator as set forth in claim 1 wherein the filtering material includes a series of stacked annular filters, said annular filters including particulate filters and chlorine getters.
Claim 7
Independent Claim
61 words
An apparatus for the removal of chlorine from a gas which includes chlorine, said apparatus comprising a housing through which said gas may pass, and a chlorine getter disposed within said housing, said chlorine getter consisting essentially of vaccum baked high surface area carbonate method hopcalite impregnated with a hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 8
Independent Claim
61 words
An apparatus for the removal of chlorine from a gas which includes chlorine, said apparatus comprising a housing through which said gas may pass, and a chlorine getter disposed within said housing, said chlorine getter consisting essentially of vaccum baked high surface area carbonate method hopcalite impregnated with a hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide.
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |