US2634360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analytical apparatus for determination of sulfur
Assignee: Standard Oil Co
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Filing: 1950-09-21
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Granted: 1953-04-07
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Expires: 1970-09-21
Abstract
No abstract record available.
Inventors
- 👤 Henry J Kusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:16
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
IN APPARATUS OF THE CHARACTER DESCRIBED, A COMBUSTION FURNACE, A HOT TUBE LEADIDNG THERETO FOR CONTAINING A COMBUSTION BOAT, AN ELECTRIC HEATER FOR SAID TUBE AND MEANS FOR CONTROLLING THE HEATER BY PROGRESSIVE INCREMENT TO VAPORIZE MATERIAL IN SUCH COMBUSTION BOAT, INCLUDING A REDUCTION GEAR AND CONSTANT SPEED MOTOR GRADUSALLY SWITCHING IN THE HEATING CURRENT FOR THE HOT TUBE FROM NOTHING TO THE MAXIMUM OF THE CONTROL MEANS, AND A SWITCH OPERATED BY SAID MOTOR SEQUENTIALLY TO SUBSTITUTE FULL LINE CURRENT DIRECTLY TO SAID ELECTRIC HEATER BY CUTTING OUT THE CONTROLLING MEANS.
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) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |