US2850520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New water-insoluble styryl dyestuffs
Assignee: Sandoz AG
•
Filing: 1957-07-12
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Granted: 1958-09-02
•
Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernest
- 👤 Bruno J R Nicolaus
- 👤 Senn Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B57/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A WATER-INSOULBLE STYRYL DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
9 words
A WATER-INSOULBLE STYRYL DYESTUFF WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2226054A
Cited
US2583551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |