US2584080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reacting ammoniacal gases
Assignee: Wyeth Holdings LLC
•
Filing: 1947-04-24
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Granted: 1952-01-29
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Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Houpt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0053; B01J12/00; B01J12/005; C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0212; C01C3/022; C01C3/0225; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/0015; B01J2219/00155
Claims Analysis
Total Claims: 0
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US2407882A
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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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |