US2431632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater for high temperature reactions and conversions
Assignee: Cities Service Oil Co
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Filing: 1943-05-27
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Granted: 1947-11-25
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Expires: 1963-05-27
Abstract
No abstract record available.
Inventors
- 👤 David G Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:03
CPC Classifications
C; C10; C10J; C10J3/00; B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/2425; B01J3/00; B01J3/04; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; C10K; C10K3/00; C10K3/001; C10K3/003; C10K3/005; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00085; B01J2219/0015; B01J2219/00155; B01J2219/18; B01J2219/182; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1943; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933; Y; Y10; Y10S; Y10S48/00; Y10S48/04; Y10S48/05
Claims Analysis
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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) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |