US2936305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble disazo dyestuffs
Assignee: Sandoz AG
•
Filing: 1957-11-14
•
Granted: 1960-05-10
•
Expires: 1977-11-14
Abstract
No abstract record available.
Inventors
- 👤 Forter Willy
- 👤 Kehrer Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A WATER INSOLUBLE DISAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
10 words
A WATER INSOLUBLE DISAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
BE521161A
Cited
GB282107A
Cited
US1851097A
Cited
US1851120A
Cited
DE614838C
Cited
US2584935A
Cited
US2666757A
Cited
US2736724A
Cited
US2741657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |