US2490753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-trifluoromethyl-1,3-butadiene
Assignee: Eastman Kodak Co
•
Filing: 1948-10-15
•
Granted: 1949-12-06
•
Expires: 1968-10-15
Abstract
No abstract record available.
Inventors
- 👤 Hubert M Hill
- 👤 Edmund B Towne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/22; C07C17/00; C07C17/35; C07C17/354; C07C21/02; C07C21/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE737276C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |