US3050378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dry carbon black pellets
Assignee: Phillips Petroleum Co
•
Filing: 1958-12-08
•
Granted: 1962-08-21
•
Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Carl M Kron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:43
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2457962A
Cited
US2695837A
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US2843942A
Cited
US2864674A
Cited
US2880519A
Cited
US2952921A
Cited
US2973249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |