Patent US2999862A successfully refreshed from Google Patents.
US2999862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting crude copper phthalocyanine into finely divided beta-form
Assignee: Sandoz AG
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Filing: 1959-08-14
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Granted: 1961-09-12
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Expires: 1979-08-14
Abstract
No abstract record available.
Inventors
- 👤 Geiger Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:40
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0022; C09B67/0023; C09B67/0025; C09B67/0026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR THE CONVERSION OF CRUDE REDDISH-BLUE COPPER PHTHALOCYANINE INTO THE FINELY DIVIDED GREENISHBLUE B-FORM HAVING IMPROVED TINCTORIAL STRENGTH, WHICH CONSISTS IN GRINDING DRY CRUDE REDDISH-BLUE COPPER PHTHALOCYANINE AT ELEVATED TEMPERATURE IN A BALL MILL IN THE PRESENCE OF WATER AS THE EXCLUSIVE GRINDING ASSISTANT AND RECOVERING THE FINELY DIVIDED GREENISH-BLUE B-FORM.
Claim 2
Dependent Claim
53 words
A PROCESS FOR THE CONVERSION OF CRUDE REDDISH-BLUE COPPER PHTHALOCYANINE INTO THE FINELY DIVIDED GREENISHBLUE B-FORM HAVING IMPROVED TINCTORIAL STRENGTH, WHICH CONSISTS IN GRINDING DRY CRUDE REDDISH-BLUE COPPER PHTHALOCYANINE AT ELEVATED TEMPERATURE IN A BALL MILL IN THE PRESENCE OF WATER AS THE EXCLUSIVE GRINDING ASSISTANT AND RECOVERING THE FINELY DIVIDED GREENISH-BLUE B-FORM.
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |