Patent US3770476A successfully refreshed from Google Patents.
US3770476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of flocculation resistant pigments
Assignee: Novartis AG
•
Filing: 1972-02-09
•
Granted: 1973-11-06
•
Expires: 1992-02-09
Abstract
Abstract Flocculation resistant pigments are prepared by milling together a phthalocyanine pigment, a chloromethylated phthalocyanine compound and organic amines.
Inventors
- 👤 Kay R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:31
CPC Classifications
C; C09; C09B; C09B68/00; C09B68/20; C09B67/00; C09B67/0032; C09B67/0033; C09B67/0034; C09B67/0035; C09B68/40; C09B68/44; C09B68/446
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
35 words
A process as claimed in claim 1 wherein R1 and R2 together with the nitrogen atom to which they are bound represent a heterocyclic radical containing a further oxygen or nitrogen atom as ring member.
Claim 2
Dependent Claim
16 words
A process as claimed in claim 1 wherein the flocculating phthalocyanine is a mono-chloro copper phthalocyanine.
Claim 3
Dependent Claim
38 words
A process as claimed in claim 1 wherein the chloromethylated copper phthalocyanine contains from 10 to 30 percent weight, based on the weight of the phthalocyanine residue, of chlorine indirectly linked to the phthalocyanine nucleus through -CH2 links.
Claim 4
Dependent Claim
36 words
A process as claimed in claim 1 wherein the proportion of the chloromethylated phthalocyanine to that of the flocculating phthalocyanine is from 1 to 15 percent by weight, based on the weight of the flocculating pigment.
Claim 5
Dependent Claim
30 words
A process as claimed in claim 1 wherein in the amine of formula I R1 is hydrogen and R2 is an alkyl radical having from one to 20 carbon atoms.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 6 wherein in the amine of the formula I, R1 is hydrogen and R2 is n-butyl.
Claim 7
Dependent Claim
29 words
A process as claimed in claim 1 wherein in the amine of formula I R1 and R2 are each an alkyl radical having from one to six carbon atoms.
Claim 8
Dependent Claim
15 words
A process as claimed in claim 1 wherein the flocculating phthalocyanine is in crude form.
Claim 9
Dependent Claim
29 words
A process as claimed in claim 1 wherein the amine is employed in an amount in excess over the stoichiometric proportion required to fully react with the chloromethylated phthalocyanine.
Claim 10
Dependent Claim
32 words
A process as claimed in claim 1 wherein the process is effected in the presence of a diluting agent and at a temperature within the range of from 15* to 30* C.
Claim 11
Dependent Claim
17 words
A process as claimed in claim 11 wherein the diluting agent is an aliphatic alcohol or ketone.
Claim 12
Dependent Claim
21 words
A process as claimed in claim 1 wherein the flocculating phthalocyanine is copper phthalocyanine containing from 0 to 10 percent chlorine.
Claim 13
Dependent Claim
15 words
A process as claimed in claim 1 wherein the flocculating phthalocyanine is a metal-free phthalocyanine.
References Cited (Backward Citations)
US3288621A
Cited
US3647496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |