US2485167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of metal-free phthalocyanine
Assignee: EIDP Inc
•
Filing: 1948-04-01
•
Granted: 1949-10-18
•
Expires: 1968-04-01
Abstract
No abstract record available.
Inventors
- 👤 Rintelman William Llewlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:37
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2155054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |