Patent US3276004A successfully refreshed from Google Patents.
US3276004A
Expired / Lapsed
US
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Apparatus for detecting gas
Assignee: EIDP Inc
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Filing: 1963-04-29
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Granted: 1966-09-27
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Edmund S Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:15
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N21/783; G08; G08B; G08B17/00; G08B17/10; G08B17/117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
GAS DETECTION APPARATUS COMPRISING A HOUSING, A MODULE OF REAGENT MOUNTED WITHIN SAID HOUSING, SAID REAGENT BEING COLOR SENSITIVE TO THE PRESENCE OF AT LEAST ONE PARTICULAR GAS, SAID HOUSING HAVING OPENINGS TO PERMIT ATMOSPHERS CONTAINING SAID PARTICULAR GAS TO ENTER AND CONTACT SAID REAGENT, MEANS TO REGULATE THE HUMIDITY WITHIN SAID HOUSING, PHOTOELECTRIC MEANS INCLUDING A LAMP AND A PHOTODETECTOR POSITIONED WITHIN SAID HOUSING TO RECEIVE LIGHT FROM SAID LAMP AFTER INCIDENCE UPON SAID REAGENT, WHEREBY COLOR CHANGES OF SAID REAGENT CAUSED BY THE PRESENCE OF SAID PARTICULAR GAS ARE SENSED BY SAID PHOTODETECTOR, THE HEAT OF SAID LAMP SERVING TO CONVECT THE SURROUNDING ATMOSPHER THROUGH SAID HOUSING VIA SAID OPENINGS THEREIN, AND ELECTRIC MEANS POWERING SAID PHOTOELECTRIC MEANS AND INCLUDING AN ALARM RESPONSIVE TO SAID PHOTODETECTOR TO SIGNAL THE PRESENCE OF A PREDETERMINED CONCENTRATIONS OF SAID PARTICULAR GAS.
Claim 2
Dependent Claim
140 words
GAS DETECTION APPARATUS COMPRISING A HOUSING, A MODULE OF REAGENT MOUNTED WITHIN SAID HOUSING, SAID REAGENT BEING COLOR SENSITIVE TO THE PRESENCE OF AT LEAST ONE PARTICULAR GAS, SAID HOUSING HAVING OPENINGS TO PERMIT ATMOSPHERS CONTAINING SAID PARTICULAR GAS TO ENTER AND CONTACT SAID REAGENT, MEANS TO REGULATE THE HUMIDITY WITHIN SAID HOUSING, PHOTOELECTRIC MEANS INCLUDING A LAMP AND A PHOTODETECTOR POSITIONED WITHIN SAID HOUSING TO RECEIVE LIGHT FROM SAID LAMP AFTER INCIDENCE UPON SAID REAGENT, WHEREBY COLOR CHANGES OF SAID REAGENT CAUSED BY THE PRESENCE OF SAID PARTICULAR GAS ARE SENSED BY SAID PHOTODETECTOR, THE HEAT OF SAID LAMP SERVING TO CONVECT THE SURROUNDING ATMOSPHER THROUGH SAID HOUSING VIA SAID OPENINGS THEREIN, AND ELECTRIC MEANS POWERING SAID PHOTOELECTRIC MEANS AND INCLUDING AN ALARM RESPONSIVE TO SAID PHOTODETECTOR TO SIGNAL THE PRESENCE OF A PREDETERMINED CONCENTRATIONS OF SAID PARTICULAR GAS.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |