Patent US2432041A successfully refreshed from Google Patents.
US2432041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuff preparations containing an ester salt of a leuco vat dyestuff, a salt of a quaternary ammonium compound, and an acid amide
Assignee: Durand and Huguenin AG
•
Filing: 1943-11-29
•
Granted: 1947-12-02
•
Expires: 1963-11-29
Abstract
No abstract record available.
Inventors
- 👤 Ratti Roger
- 👤 Brandt Philipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:23
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/655; D06P1/22; D06P1/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2184495A
Cited
US2003960A
Cited
US2302753A
Cited
GB428701A
Cited
US2041220A
Cited
US2122113A
Cited
US2214352A
Cited
US2079788A
Cited
US2160119A
Cited
US2193749A
Cited
US2224280A
Cited
US2211126A
Cited
US2267609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |