Patent US2755200A successfully refreshed from Google Patents.
US2755200A
Expired / Lapsed
US
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Stabilized coloring compositions and methods of making and using same
Assignee: EIDP Inc
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Filing: 1953-12-28
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Granted: 1956-07-17
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Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 Balon Walter Jean
- 👤 Stallmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:42
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A COLORING COMPOSITION COMPRISING AN N-POLYALKYLTRI(P-AMINOPHENYL) CARBINOL IN THE FORM OF COLORLESS CRYSTALS INTIMATELY ASSOCIATED WITH A QUANTITY OF A QUATERNARY AMMONIUM HYDROXIDE CORRESPONDING TO NOT LESS THAN 2.5% BY WEIGHT OF SAID CARBINOL, SAID COLORING COMPOSITION BEING CHARACTERIZED BY A RETARDED TENDENCY TO BECOME DISCOLORED UPON EXPOSURE TO THE ATMOSPHERE, AND BY YIELDING RAPIDLY THE CORRESPONDING POLYALKYL-TRIAMINO TRIPHENYL-METHANE DYE UPON CONTACT WITH ACID, THE TERM "POLYALKYL" IN THIS CLAIM BEING LIMITED TO THE PRESENCE OF NOT LESS THAN 5 AND NOT MORE THAN 6 ALKYL RADICALS PER MOLECULE AND EACH OF SAID ALKYL RADICALS CONTAINING NOT MORE THAN 4 C-ATOMS.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |