US2619409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the combustible content of a gas
Assignee: Union Carbide Corp
•
Filing: 1948-07-29
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Granted: 1952-11-25
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Stanford B Spracklen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:15
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/28; G01N25/30; G01N25/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
IN AN APPARATUS FOR INDICATING THE COMBUSTIBLE CONTENT OF A GAS, A CATALYST FILAMENT, MEANS FOR HEATING SAID FILAMENT, MEANS FOR PASSING SAID GAS ACROSS THE FILAMENT, A FILAMENTARY THERMOCOUPLE IN SPOT-WELDED CONTACT WITH SAID FILAMENT, AND A VOLTAGE INDICATOR FOR SAID THERMOCOUPLE.
Claim 2
Dependent Claim
43 words
IN AN APPARATUS FOR INDICATING THE COMBUSTIBLE CONTENT OF A GAS, A CATALYST FILAMENT, MEANS FOR HEATING SAID FILAMENT, MEANS FOR PASSING SAID GAS ACROSS THE FILAMENT, A FILAMENTARY THERMOCOUPLE IN SPOT-WELDED CONTACT WITH SAID FILAMENT, AND A VOLTAGE INDICATOR FOR SAID THERMOCOUPLE.
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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) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |