US2840362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating gases
Assignee: Oxy Catalyst Inc
•
Filing: 1954-06-04
•
Granted: 1958-06-24
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Elvin L Krieble
- 👤 Eugene J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
F; F23; F23J; F23J11/00; F23B; F23B7/00; F23D; F23D14/00; F23D14/02; F23D14/04; F23G; F23G5/00; F23G5/08; F23G5/14; F23G5/16; F23G7/00; F23G7/06; F23G7/07; F23J15/00; F23Q; F23Q13/00; F23B2700/00; F23B2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301324A
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US1528816A
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US1773256A
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US1863391A
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US2066524A
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US2231445A
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US2444588A
Cited
US2583736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |