Patent US3094393A successfully refreshed from Google Patents.
US3094393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting inflammable gases
Assignee: Individual
•
Filing: 1960-10-17
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Granted: 1963-06-18
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Expires: 1980-10-17
Abstract
No abstract record available.
Inventors
- 👤 Sieger Joshua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN APPARATUS FOR DETECTING THE PRESENCE OF INFLAMMABLE GASES OF THE TYPE INCLUDING A WHEATSTONE BRIDGE, AT LEAST TWO ARMS OF SAID BRIDGE INCLUDING A DETECTOR ELEMENT AND A BALANCING ELEMENT RESPECTIVELY, SAID ELEMENTS BEING DISPOSED CLOSE TOGETHER, AND HENCE EXPOSED TO SIMILAR AMBIENT CONDITIONS, AND HAVING SUBSTANTIALLY THE SAME TEMPERATURE COEFFICIENT OF RESISTANCE, SAID DETECTOR ELEMENT INCLUDING A HELICALLY WOUND WIRE HAVNG SPACED TURNS AND BEING CONSTITUTED TO BE MUCH MORE ACTIVE CATALYTICALLY THAN SAID BALANCING ELEMENT, THE IMPROVEMENT WHICH COMPRISES A DETECTOR ELEMENT HAVING THE SPACES BETWEEN TURNS BETWEEN ABOUT ONE-HALF AND TWICE THE DIAMETER OF THE WIRE.
Claim 2
Dependent Claim
100 words
IN APPARATUS FOR DETECTING THE PRESENCE OF INFLAMMABLE GASES OF THE TYPE INCLUDING A WHEATSTONE BRIDGE, AT LEAST TWO ARMS OF SAID BRIDGE INCLUDING A DETECTOR ELEMENT AND A BALANCING ELEMENT RESPECTIVELY, SAID ELEMENTS BEING DISPOSED CLOSE TOGETHER, AND HENCE EXPOSED TO SIMILAR AMBIENT CONDITIONS, AND HAVING SUBSTANTIALLY THE SAME TEMPERATURE COEFFICIENT OF RESISTANCE, SAID DETECTOR ELEMENT INCLUDING A HELICALLY WOUND WIRE HAVNG SPACED TURNS AND BEING CONSTITUTED TO BE MUCH MORE ACTIVE CATALYTICALLY THAN SAID BALANCING ELEMENT, THE IMPROVEMENT WHICH COMPRISES A DETECTOR ELEMENT HAVING THE SPACES BETWEEN TURNS BETWEEN ABOUT ONE-HALF AND TWICE THE DIAMETER OF THE WIRE.
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |