US2993038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo-dyestuffs
Assignee: CIBA Co Inc
•
Filing: 1957-09-09
•
Granted: 1961-07-18
•
Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 Fasciati Alfred
- 👤 Gunst Raymond
- 👤 Riat Henri
- 👤 Seitz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:13
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
13 words
THE DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2722527A
Cited
GB760085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |