US3523759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1967-10-16
•
Granted: 1970-08-11
•
Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Jesse R Kidd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:28
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2375798A
Cited
US3013865A
Cited
US3079236A
Cited
US3283028A
Cited
US3355247A
Cited
US3376111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |