US3218310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrimidine azo dyestuffs
Assignee: Sandoz AG
•
Filing: 1962-11-28
•
Granted: 1965-11-16
•
Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Benz Jakob
- 👤 Ischer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/20; C09B62/26; C09B62/24; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
WATER-SOLUBLE AZO DYESTUFFS OF THE FORMULA
Claim 2
Dependent Claim
6 words
WATER-SOLUBLE AZO DYESTUFFS OF THE FORMULA
References Cited (Backward Citations)
US223019A
Cited
US2665273A
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US1667312A
Cited
US1886480A
Cited
US2232892A
Cited
US2820785A
Cited
US2935506A
Cited
US2980665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |