US2892829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New monoazo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1955-11-25
•
Granted: 1959-06-30
•
Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Stephen William Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:04
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
MONOAZO DYESTUFFS WHICH IN THE FORM OF THEIR FREE ACIDS ARE OF THE FORMULA:
Claim 2
Dependent Claim
14 words
MONOAZO DYESTUFFS WHICH IN THE FORM OF THEIR FREE ACIDS ARE OF THE FORMULA:
References Cited (Backward Citations)
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US1886480A
Cited
US2000121A
Cited
US2093424A
Cited
US2339739A
Cited
US2384283A
Cited
US2722527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |