US2421291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing ink
Assignee: Sun Chemical Corp
•
Filing: 1943-04-02
•
Granted: 1947-05-27
•
Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Schmutzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:20
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/033
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1922646A
Cited
GB337199A
Cited
US2115716A
Cited
US2158481A
Cited
GB456898A
Cited
US2157385A
Cited
GB468384A
Cited
US2244103A
Cited
US2285183A
Cited
US2361009A
Cited
US2335882A
Cited
US2346969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |