US2982764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-containing trisazo dyestuffs
Assignee: Novartis AG
•
Filing: 1958-03-31
•
Granted: 1961-05-02
•
Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Bitterlin Otto
- 👤 Bossard Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:28
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/24; C09B45/28; C09B31/00; C09B31/16; C09B31/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A CUPRIFEROUS TRISAZO DYESTUFF OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
A CUPRIFEROUS TRISAZO DYESTUFF OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2769805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |