US2169355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color-grading system
Assignee: Individual
•
Filing: 1936-08-17
•
Granted: 1939-08-15
•
Expires: 1956-08-17
Abstract
No abstract record available.
Inventors
- 👤 Willi M Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:33
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/342; Y; Y10; Y10S; Y10S209/00; Y10S209/938
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) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |