US2230467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined regenerator and catalyst chamber
Assignee: MW Kellogg Co
•
Filing: 1938-01-27
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Granted: 1941-02-04
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Expires: 1958-01-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry M Nelly
- 👤 Hoyt C Hottel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/46; B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; C01B3/38; F; F22; F22B; F22B1/00; F22B1/02; F22B1/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-04 | 1944-08-05 | 1945-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-04 | 1948-08-05 | 1949-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-04 | 1952-08-05 | 1953-02-04 | $7700.00 | Window Closed / Lapsed |