US2929673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cupriferous disazo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1956-01-26
•
Granted: 1960-03-22
•
Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Schucan Hans Lnzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:41
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A CUPRIFEROUS DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
14 words
A CUPRIFEROUS DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 3
Dependent Claim
14 words
A CUPRIFEROUS DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 4
Dependent Claim
14 words
A CUPRIFEROUS DISAZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |