US2837528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine pigments
Assignee: J R Geigh A G
•
Filing: 1956-01-30
•
Granted: 1958-06-03
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Pugin Andre
- 👤 Keller Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:23
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/22; C07D249/18; C07D249/20; C09; C09B; C09B43/00; C09B47/00; C09B47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A PHTHALOCYANINE PIGMENT DYE OF THE FORMULA
Claim 2
Dependent Claim
7 words
A PHTHALOCYANINE PIGMENT DYE OF THE FORMULA
References Cited (Backward Citations)
FR830909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |