Patent US3209343A successfully refreshed from Google Patents.
US3209343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-station gas detecting apparatus
Assignee: NL Industries Inc
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Filing: 1961-12-11
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Granted: 1965-09-28
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Glen M Dunham
- 👤 Gerald L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:37
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
APPARATUS FOR WARNING OF ATMOSPHERIC CONTAMINATION COMPRISING A DEVICE SENSITIVE TO ATMOSPHERIC CONTAMINATION, SAMPLING MEANS FOR EXPOSING SAID DEVICE TO ATMOSPHERE TO TESTED, TEST MEANS FOR TESTING THE INTEGRITY OF SAID DEVICE, A WARNING SIGNAL, AN OPERATION SELECTOR HAVING FIRST, SECOND, AND THIRD POSITIONS, MEANS OPERATIVELY CONNECTING SAID DEVICE AND SAID SELECTOR AND RESPONSIVE TO CONTAMINANT INDICATING STIMULATION OF SAID DEVICE, WHEN SAID SELECTOR IS IN SAID FIRST POSITION, TO SHIFT SAID SELECTOR TO SAID SECOND POSITION, MEANS FOR OPERATIVELY CONNECTING SAID DEVICE TO SAID TEST MEANS THROUGH SAID SELECTOR WHEN IN SAID SECOND POSITION FOR TESING THE ACCURACY OF RESPONSE OF SAID DEVICE AND SHIFTING SAID SELECTOR TO SAID THIRD POSITION RESPONSIVE TO PREDETERMINED ACTUATION OF SAID TEST MEANS, AND MEANS OPERATIVELY CONNECTING SAID DEVICE TO SAID WARNING SIGNAL THROUGH SAI DSELECTOR WHEN IN SAID THIRD POSITION FOR ENERGIZING SAID SIGNAL RESPONSIVE TO CONTAMINANT INDICATING STIMULATION OF SAID DEVICE AFTER VERIFICATION OF THE INTEGRITY OF SAID DEVICE.
Claim 2
Dependent Claim
158 words
APPARATUS FOR WARNING OF ATMOSPHERIC CONTAMINATION COMPRISING A DEVICE SENSITIVE TO ATMOSPHERIC CONTAMINATION, SAMPLING MEANS FOR EXPOSING SAID DEVICE TO ATMOSPHERE TO TESTED, TEST MEANS FOR TESTING THE INTEGRITY OF SAID DEVICE, A WARNING SIGNAL, AN OPERATION SELECTOR HAVING FIRST, SECOND, AND THIRD POSITIONS, MEANS OPERATIVELY CONNECTING SAID DEVICE AND SAID SELECTOR AND RESPONSIVE TO CONTAMINANT INDICATING STIMULATION OF SAID DEVICE, WHEN SAID SELECTOR IS IN SAID FIRST POSITION, TO SHIFT SAID SELECTOR TO SAID SECOND POSITION, MEANS FOR OPERATIVELY CONNECTING SAID DEVICE TO SAID TEST MEANS THROUGH SAID SELECTOR WHEN IN SAID SECOND POSITION FOR TESING THE ACCURACY OF RESPONSE OF SAID DEVICE AND SHIFTING SAID SELECTOR TO SAID THIRD POSITION RESPONSIVE TO PREDETERMINED ACTUATION OF SAID TEST MEANS, AND MEANS OPERATIVELY CONNECTING SAID DEVICE TO SAID WARNING SIGNAL THROUGH SAI DSELECTOR WHEN IN SAID THIRD POSITION FOR ENERGIZING SAID SIGNAL RESPONSIVE TO CONTAMINANT INDICATING STIMULATION OF SAID DEVICE AFTER VERIFICATION OF THE INTEGRITY OF SAID DEVICE.
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |