Patent JPS6218652A successfully refreshed from Google Patents.
Patent US3125050A successfully refreshed from Google Patents.
Patent US2314440A successfully refreshed from Google Patents.
US2314440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs and process for coloring therewith
Assignee: GAF Chemicals Corp
•
Filing: 1938-01-19
•
Granted: 1943-03-23
•
Expires: 1958-01-19
Abstract
No abstract record available.
Inventors
- 👤 Bernd V Bock
- 👤 Ufer Hanns
- 👤 Kleiner Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:15
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1946-03-22 | 1946-09-21 | 1947-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-22 | 1950-09-21 | 1951-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-22 | 1954-09-21 | 1955-03-23 | $7700.00 | Window Closed / Lapsed |