US2468713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isocyanates and products prepared therefrom and methods of making the same
Assignee: Wyeth Holdings LLC
•
Filing: 1947-04-16
•
Granted: 1949-04-26
•
Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
- 👤 Arthur S Nyquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/728; C07; C07C; C07C265/00; C07C265/12; C08F; C08F26/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2326287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |