US2590219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of effecting chemical reactions
Assignee: CH Wheeler Manufacturing Co
•
Filing: 1945-06-15
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Granted: 1952-03-25
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Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 Nicholas N Stephanoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:22
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J19/00; B01J19/24; B01J19/245; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00162; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1512225A
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US2237091A
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GB513947A
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US2257907A
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GB546088A
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US2351091A
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US2391723A
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US2376833A
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US2419097A
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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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |