US2575855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact tower reactor for vapor phase nitration
Assignee: Commercial Solvents Corp
•
Filing: 1946-06-17
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Granted: 1951-11-20
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Expires: 1966-06-17
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Stengel
- 👤 Richard S Egly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:54
CPC Classifications
B; B01; B01J; B01J10/00; B01J10/002; B01J19/00; B01J19/26; C; C07; C07C; C07C201/00; C07C201/06; C07C201/08; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00105; B01J2219/00108; B01J2219/00121; B01J2219/00123; B01J2219/0015; B01J2219/00157; B01J2219/00159; B01J2219/00164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2086808A
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US2162158A
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US2220219A
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US2330767A
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US2374660A
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US2300985A
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US2433798A
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US2418857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |