US2741912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting gases or vapors
Assignee: HERMANN SEWERIN VORM VULKAN WE
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Filing: 1952-12-10
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Granted: 1956-04-17
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Expires: 1972-12-10
Abstract
No abstract record available.
Inventors
- 👤 Schultze Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:27
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
APPARATUS FOR DETECTING GASES OR VAPORS IN THE AIR, COMPRISING, IN COMBINATION, A QUANTITY OF GRANULATED ACTIVATED CARBON; CONTAINER MEANS SURROUNDING AND ENGAGING SAID CARBON ALONG THE DEPTH THEREOF AND SUPPORTING AT LEAST A PART OF SAID QUANTITY OF GRANULATED CARBON IN CONTACT WITH THE SURROUNDING ATMOSPHERE SAID CONTAINER BEING AT LEAST FILLED BY SAID CARBON, SAID CONTAINER MEANS INCLUDING A PAIR OF ELECTRICALLY CONDUCTIVE WALL PORTIONS SPACED AND INSULATED FROM EACH OTHER AND CONTACTING SAID CARBON THE LATTER SUBSTANTIALLY BRIDGING SAID ELECTRICALLY CONDUCTIVE WALL PORTIONS IN MASS-LIKE FORM, SAID PAIR OF WALL PORTIONS BEING ADAPTED TO BE CONNECTED TO A SOURCE OF POTENTIAL TO FORM A CIRCUIT FOR ESTABLISHING A CURRENT FLOW THROUGH SAID CARBON; AND ELECTRICAL INDICATOR MEANS CONNECTED ELECTRICALLY TO ONE OF SAID WALL PORTIONS AND ADAPTED TO BE PLACED IN SAID CIRCUIT FOR INDICATING A VARIATION IN THE CURRENT PASSING THROUGH SAID GRANULATED CARBON.
Claim 2
Dependent Claim
148 words
APPARATUS FOR DETECTING GASES OR VAPORS IN THE AIR, COMPRISING, IN COMBINATION, A QUANTITY OF GRANULATED ACTIVATED CARBON; CONTAINER MEANS SURROUNDING AND ENGAGING SAID CARBON ALONG THE DEPTH THEREOF AND SUPPORTING AT LEAST A PART OF SAID QUANTITY OF GRANULATED CARBON IN CONTACT WITH THE SURROUNDING ATMOSPHERE SAID CONTAINER BEING AT LEAST FILLED BY SAID CARBON, SAID CONTAINER MEANS INCLUDING A PAIR OF ELECTRICALLY CONDUCTIVE WALL PORTIONS SPACED AND INSULATED FROM EACH OTHER AND CONTACTING SAID CARBON THE LATTER SUBSTANTIALLY BRIDGING SAID ELECTRICALLY CONDUCTIVE WALL PORTIONS IN MASS-LIKE FORM, SAID PAIR OF WALL PORTIONS BEING ADAPTED TO BE CONNECTED TO A SOURCE OF POTENTIAL TO FORM A CIRCUIT FOR ESTABLISHING A CURRENT FLOW THROUGH SAID CARBON; AND ELECTRICAL INDICATOR MEANS CONNECTED ELECTRICALLY TO ONE OF SAID WALL PORTIONS AND ADAPTED TO BE PLACED IN SAID CIRCUIT FOR INDICATING A VARIATION IN THE CURRENT PASSING THROUGH SAID GRANULATED CARBON.
References Cited (Backward Citations)
FR963759A
Cited
GB191325046A
Cited
GB134243A
Cited
US2047638A
Cited
US2327060A
Cited
US2589983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |