US2861067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable azo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1955-10-31
•
Granted: 1958-11-18
•
Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Andrew Herbert Francis
- 👤 Davies Robert Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:16
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B45/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A METALLIZABLE AZO DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
7 words
A METALLIZABLE AZO DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US1074946A
Cited
DE643699C
Cited
US2283294A
Cited
US2234724A
Cited
GB546017A
Cited
US2495244A
Cited
US2794797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |