US2401599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acyl biurets
Assignee: Wyeth Holdings LLC
•
Filing: 1943-06-08
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Granted: 1946-06-04
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Expires: 1963-06-08
Abstract
No abstract record available.
Inventors
- 👤 Adams Pierrepont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C273/1863; C07C273/1872
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) | 1949-06-03 | 1949-12-03 | 1950-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-03 | 1953-12-03 | 1954-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-03 | 1957-12-03 | 1958-06-04 | $7700.00 | Window Closed / Lapsed |