Patent US2840568A successfully refreshed from Google Patents.
US2840568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid milling of phthalocyanine pigments
Assignee: Individual
•
Filing: 1953-04-29
•
Granted: 1958-06-24
•
Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robert E Brouillard
- 👤 Thomas D Mutaffis
- 👤 Marvin O Shrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS COMPRISING MILLING WITH FORCES PREDOMINANTLY SHEARING IN NATURE, A MIXTURE IN THE FORM OF A DOUGHY, KNEADABLE MASS COMPRISING A PHTHALOCYANINE PIGMENT, FROM ABOUT 0.5 TO 5 PARTS BY WEIGHT PER PART OF PIGMENT OF AN ACID-STABLE, WATER-SOLUBLE INORGANIC SALT AND FROM ABOUT 0.5 TO 2 PARTS BY WEIGHT PER PART OF PIGMENT OF A STRONG, NORMALLY LIQUID, NON-REACTIVE AID HAVING A CONCENTRATION RANGING FROM 68 TO 100 PERCENT, AND DROWING THE RESULTING MILLED MIXTURE IN WATER.
Claim 2
Dependent Claim
79 words
A PROCESS COMPRISING MILLING WITH FORCES PREDOMINANTLY SHEARING IN NATURE, A MIXTURE IN THE FORM OF A DOUGHY, KNEADABLE MASS COMPRISING A PHTHALOCYANINE PIGMENT, FROM ABOUT 0.5 TO 5 PARTS BY WEIGHT PER PART OF PIGMENT OF AN ACID-STABLE, WATER-SOLUBLE INORGANIC SALT AND FROM ABOUT 0.5 TO 2 PARTS BY WEIGHT PER PART OF PIGMENT OF A STRONG, NORMALLY LIQUID, NON-REACTIVE AID HAVING A CONCENTRATION RANGING FROM 68 TO 100 PERCENT, AND DROWING THE RESULTING MILLED MIXTURE IN WATER.
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |