US3455655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of missile fuels in gas atmosphere
Assignee: MSA Safety Inc
•
Filing: 1965-06-01
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Granted: 1969-07-15
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Charles A Plantz
- 👤 David G Hannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A METHOD OF DETECTING A VOLATILE NITROGEN COMPOUND OF THE GROUP CONSISTING OF HYDRAZINE, HYDRAZINE HYDRATE, RED FUMING NITIRIC ACID (RFNA), UNSYMMETRICAL DIMETHYL HYDRAZINE (UDMH) AND ALKYL HYDRAZINES IN A GAS, THE STEP CONSISTING OF PASSING THE GAS, TO BE TESTED FOR THE PRESENCE OF SAID COMPOUND, INTO CONTACT WITH A REAGENT CONSISTING ESSENTIALLY OF A SOLUBLE HEXAVALENT CHROMIUM COMPOUND AND A PENTAVLENT PHOSPHORIC ACID SUPPORTED BY AN INERT CARRIER AND PROVIDING FROM 0.0145 GRAM TO 2.6 GRAMS OF HEXAVALENT CHROMIUM AND FROM 0.022 GRAM TO 24 GRAMS OF PENTAVALENT PHOSPHORUS PER 100 MILLILITERS OF CARRIER, THE REAGENT UNDERGOING A COLOR CHANGE IN THE PRESENCE OF SAID COMPOUND.
Claim 2
Dependent Claim
109 words
IN A METHOD OF DETECTING A VOLATILE NITROGEN COMPOUND OF THE GROUP CONSISTING OF HYDRAZINE, HYDRAZINE HYDRATE, RED FUMING NITIRIC ACID (RFNA), UNSYMMETRICAL DIMETHYL HYDRAZINE (UDMH) AND ALKYL HYDRAZINES IN A GAS, THE STEP CONSISTING OF PASSING THE GAS, TO BE TESTED FOR THE PRESENCE OF SAID COMPOUND, INTO CONTACT WITH A REAGENT CONSISTING ESSENTIALLY OF A SOLUBLE HEXAVALENT CHROMIUM COMPOUND AND A PENTAVLENT PHOSPHORIC ACID SUPPORTED BY AN INERT CARRIER AND PROVIDING FROM 0.0145 GRAM TO 2.6 GRAMS OF HEXAVALENT CHROMIUM AND FROM 0.022 GRAM TO 24 GRAMS OF PENTAVALENT PHOSPHORUS PER 100 MILLILITERS OF CARRIER, THE REAGENT UNDERGOING A COLOR CHANGE IN THE PRESENCE OF SAID COMPOUND.
References Cited (Backward Citations)
US3131030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |