US2424811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous flaked catalyst composition and its preparation
Assignee: Seymour Manufacturing Co
•
Filing: 1941-06-16
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Granted: 1947-07-29
•
Expires: 1961-06-16
Abstract
No abstract record available.
Inventors
- 👤 Meyer L Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; C; C11; C11C; C11C3/00; C11C3/12
Claims Analysis
Total Claims: 0
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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) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |