US2902453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye stripping solution
Assignee: Rohm and Haas Co
•
Filing: 1955-12-13
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Granted: 1959-09-01
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel A Matlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:35
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/13; D06P5/138
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN AQUEOUS COMPOSITION COMPRISING A SOLUTION IN WATER OF 0.01 TO 1% OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROSULFITES, ALDEHYDE, SULFOXYLATES AND SULFINIC ACIDS, A QUATERNARY AMMONIUM COMPOUND CONTAINING A HYDROPHOBIC SUBSTITUENT HAVING AT LEAST 8 CARBON ATOMS AND HAVING THE FORMULA 1:
Claim 2
Dependent Claim
47 words
AN AQUEOUS COMPOSITION COMPRISING A SOLUTION IN WATER OF 0.01 TO 1% OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROSULFITES, ALDEHYDE, SULFOXYLATES AND SULFINIC ACIDS, A QUATERNARY AMMONIUM COMPOUND CONTAINING A HYDROPHOBIC SUBSTITUENT HAVING AT LEAST 8 CARBON ATOMS AND HAVING THE FORMULA 1:
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |