US2329644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic composition
Assignee: Monsanto Chemicals Ltd
•
Filing: 1939-07-13
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Granted: 1943-09-14
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Expires: 1959-07-13
Abstract
No abstract record available.
Inventors
- 👤 Grafton R Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/26; C; C07; C07C; C07C67/00; C07C67/04; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J31/02; B01J31/04
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) | 1946-09-13 | 1947-03-15 | 1947-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-13 | 1951-03-15 | 1951-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-13 | 1955-03-15 | 1955-09-14 | $7700.00 | Window Closed / Lapsed |