Patent US2576293A successfully refreshed from Google Patents.
US2576293A
Expired / Lapsed
US
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Dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1949-07-11
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Granted: 1951-11-27
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Expires: 1969-07-11
Abstract
No abstract record available.
Inventors
- 👤 France Harold
- 👤 Haddock Norman Hulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/24; C09B11/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE NEW DYESTUFFS WHICH ARE REPRESENTED BY THE FORMULA-
Claim 2
Dependent Claim
9 words
THE NEW DYESTUFFS WHICH ARE REPRESENTED BY THE FORMULA-
References Cited (Backward Citations)
US2296153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |