US3351580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo disperse dyestuffs
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1963-08-13
•
Granted: 1967-11-07
•
Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Koike Eiji
- 👤 Kanazawa Fujio
- 👤 Otsuka Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:56
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/025; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A DISAZO DISPERSE DYESTUFF HAVING THE GENERAL FORMULA,
Claim 2
Dependent Claim
8 words
A DISAZO DISPERSE DYESTUFF HAVING THE GENERAL FORMULA,
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |