US2521207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous reaction furnace and controller
Assignee: Shawinigan Chemicals Ltd
•
Filing: 1945-11-30
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Granted: 1950-09-05
•
Expires: 1965-11-30
Abstract
No abstract record available.
Inventors
- 👤 Eaton Milton
- 👤 Walter E Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; C; C07; C07C; C07C45/00; C07C45/87; C07C45/89; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00063; B01J2219/00132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN APPARATUS FOR CARRYING OUT REACTIONS IN THE GAS PHASE COMPRISING (A) SOURCES OF ALTERNATING AND DIRECT CURRENT POWER, (B) A FURNACE, (C) A PLURALITY OF ELECTRIC HEATERS IN SAID FURNACE ENERGIZED BY SAID ALTERNATING-CURRENT POWER, (D) A PLURALITY OF SATURABLE-CORE REACTORS, EACH WITH A RHEOSTAT FOR INDIVIDUALLY ADJUSTING ITS REACTANCE BY CONTROL OF THE SATURATING CURRENT, EACH HEATER BEING IN SERIES WITH A CORRESPONDING REACTOR, (E) A MAIN RHEOSTAT FOR ADJUSTING SIMULTANEOUSLY AND
Claim 2
Independent Claim
74 words
AN APPARATUS FOR CARRYING OUT REACTIONS IN THE GAS PHASE COMPRISING (A) SOURCES OF ALTERNATING AND DIRECT CURRENT POWER, (B) A FURNACE, (C) A PLURALITY OF ELECTRIC HEATERS IN SAID FURNACE ENERGIZED BY SAID ALTERNATING-CURRENT POWER, (D) A PLURALITY OF SATURABLE-CORE REACTORS, EACH WITH A RHEOSTAT FOR INDIVIDUALLY ADJUSTING ITS REACTANCE BY CONTROL OF THE SATURATING CURRENT, EACH HEATER BEING IN SERIES WITH A CORRESPONDING REACTOR, (E) A MAIN RHEOSTAT FOR ADJUSTING SIMULTANEOUSLY AND
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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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |