US2794797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable azo dyestuffs
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-09-06
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Granted: 1957-06-04
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Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 Davies Robert Ronald
- 👤 Todd Alexander Robertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:21
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/576; C07F9/60; C09; C09B; C09B35/00; C09B45/00; C09B69/00; C09B69/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A METALLIZABLE AZO DYESTUFF CHARACTERIZED IN THAT IT CONTAINS AT LEAST ONCE THE GROUP
Claim 2
Dependent Claim
14 words
A METALLIZABLE AZO DYESTUFF CHARACTERIZED IN THAT IT CONTAINS AT LEAST ONCE THE GROUP
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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |