US2942952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determination of gaseous chlorine and bromine
Assignee: MSA Safety Inc
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Filing: 1958-04-03
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Granted: 1960-06-28
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Charles A Plantz
- 👤 Evelyn C Stanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THAT METHOD OF DETERMINING A MAMBER SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE IN A GAS WHICH COMPRISES THE STEPS OF PASSING GAS TO BE TESTED THROUGH A BODY INERT GRANDULAR SOLID CARRYING A REAGENT OF THE GROUP CONSITING OF N,N,N'',N'' -TETRAPHENYLBENZIDINE AND N,N'' -DIMETHYL-N,N'' DIPHENYLBENZINE, SAID BODY BEING CONFINED WITHIN A TRANSPARENT CONTAINER AND SAID REAGENT BEING CHANGED IN COLOR BY CONTACT WITH SAID MEMBER.
Claim 2
Dependent Claim
68 words
THAT METHOD OF DETERMINING A MAMBER SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE IN A GAS WHICH COMPRISES THE STEPS OF PASSING GAS TO BE TESTED THROUGH A BODY INERT GRANDULAR SOLID CARRYING A REAGENT OF THE GROUP CONSITING OF N,N,N'',N'' -TETRAPHENYLBENZIDINE AND N,N'' -DIMETHYL-N,N'' DIPHENYLBENZINE, SAID BODY BEING CONFINED WITHIN A TRANSPARENT CONTAINER AND SAID REAGENT BEING CHANGED IN COLOR BY CONTACT WITH SAID MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |