US2444237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite pigments
Assignee: Wyeth Holdings LLC
•
Filing: 1946-08-29
•
Granted: 1948-06-29
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 Aagaard Leif
- 👤 Winfred J Cauwenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:12
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |