US2927040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-staining triarylmethane color base and method of printing therewith
Assignee: Individual
•
Filing: 1957-08-13
•
Granted: 1960-03-01
•
Expires: 1977-08-13
Abstract
No abstract record available.
Inventors
- 👤 Davis Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:05
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/003; D06P5/004; D06P5/006; C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/12; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF PRINTING WHICH COMPRISES APPLYING TO A SURFACE CHARACTERIZED BY HIGH ACID STRENGTH A SUBSTANTIALLY NONSTAINING LIQUID WHICH COMPRISES A NONSTAINING TRIARYLMETHANE COLOR BASE CONTAINING AT LEAST TWO DIALKYLAMINO-SUBSTITUTED ARYL GROUPS HAVING AS A SUBSTITUENT A NITRO GROUP AND CHARACTERIZED BY A LOGARITHMIC DISSOCIATION CONSTANT BETWEEN 2 AND 5, SAID NONSTAINING TRIARYLMETHANE COLOUR BASE BEING STRUCTURALLY ADAPTED TO REACT WITH THE ACID SURFACE TO FORM AN INTENSELY COLORED SALT.
Claim 2
Independent Claim
71 words
THE METHOD OF PRINTING WHICH COMPRISES APPLYING TO A SURFACE CHARACTERIZED BY HIGH ACID STRENGTH A SUBSTANTIALLY NONSTAINING LIQUID WHICH COMPRISES A NONSTAINING TRIARYLMETHANE COLOR BASE CONTAINING AT LEAST TWO DIALKYLAMINO-SUBSTITUTED ARYL GROUPS HAVING AS A SUBSTITUENT A NITRO GROUP AND CHARACTERIZED BY A LOGARITHMIC DISSOCIATION CONSTANT BETWEEN 2 AND 5, SAID NONSTAINING TRIARYLMETHANE COLOUR BASE BEING STRUCTURALLY ADAPTED TO REACT WITH THE ACID SURFACE TO FORM AN INTENSELY COLORED SALT.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |