US2559807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuff preparations
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1949-01-27
•
Granted: 1951-07-10
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Topham Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/62; D06P1/628; D06P1/22; D06P1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
DYESTUFF PREPARATIONS FOR USE IN THE PRINTING OF TEXTILE MATERIALS COMPRISING A LEUCO SULPHURIC ESTER DERIVATIVE OF A VAT DYESTUFF AND A SULPHONATED BENZAMIDINE OF THE GENERAL FORMULA RX WHEREIN R IS A SULPHONATED MONOCYCLIC AROMATIC HYDROCARBON RADICAL AND X IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
49 words
DYESTUFF PREPARATIONS FOR USE IN THE PRINTING OF TEXTILE MATERIALS COMPRISING A LEUCO SULPHURIC ESTER DERIVATIVE OF A VAT DYESTUFF AND A SULPHONATED BENZAMIDINE OF THE GENERAL FORMULA RX WHEREIN R IS A SULPHONATED MONOCYCLIC AROMATIC HYDROCARBON RADICAL AND X IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |