US2963504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl toluene diisocyanates
Assignee: Wyeth Holdings LLC
•
Filing: 1958-06-09
•
Granted: 1960-12-06
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Jack H Thelin
- 👤 William B Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2642449A
Cited
GB761113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |