US1823865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of crotonaldehyde
Assignee: Commercial Solvents Corp
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Filing: 1927-11-07
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Granted: 1931-09-15
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Expires: 1947-11-07
Abstract
No abstract record available.
Inventors
- 👤 Swallen Lloyd Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/72; C; C07; C07C; C07C29/00; C07C29/17; C07C29/175; C07C45/00; C07C45/61; C07C45/62
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) | 1934-09-14 | 1935-03-16 | 1935-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-14 | 1939-03-16 | 1939-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-14 | 1943-03-16 | 1943-09-15 | $7700.00 | Window Closed / Lapsed |