US2492959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye pigment
Assignee: NL Industries Inc
•
Filing: 1947-03-18
•
Granted: 1950-01-03
•
Expires: 1967-03-18
Abstract
No abstract record available.
Inventors
- 👤 Warren B Blumenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/02; C09B69/06; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF PRODUCING A PIGMENT WHICH COMPRISES REACTING A BASIC DYE IN AN AQUEOUS SOLUTION WITHIN THE PH RANGE PH 3.5 TO 6.5 WITH A HYDROUS ZIRCONIA HYDROGEL, THE USUAL POSITIVE CHARGE OF WHICH HAS BEEN CHANGED TO A NEGATIVE CHARGE BY SELECTIVE COMBINATION OF AN ANION WHICH INDUCES CATAPHORETIC MOVEMENT OF THE RESULTING NEGATIVE MICELLE TO THE POSITIVE ELECTRODE OF A CATAPHORETIC CELL.
Claim 2
Independent Claim
65 words
THE METHOD OF PRODUCING A PIGMENT WHICH COMPRISES REACTING A BASIC DYE IN AN AQUEOUS SOLUTION WITHIN THE PH RANGE PH 3.5 TO 6.5 WITH A HYDROUS ZIRCONIA HYDROGEL, THE USUAL POSITIVE CHARGE OF WHICH HAS BEEN CHANGED TO A NEGATIVE CHARGE BY SELECTIVE COMBINATION OF AN ANION WHICH INDUCES CATAPHORETIC MOVEMENT OF THE RESULTING NEGATIVE MICELLE TO THE POSITIVE ELECTRODE OF A CATAPHORETIC CELL.
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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |