US3406426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming aggregates of powdered materials
Assignee: Columbian Carbon Co
•
Filing: 1966-10-25
•
Granted: 1968-10-22
•
Expires: 1986-10-25
Abstract
No abstract record available.
Inventors
- 👤 Jr David F Pobst
- 👤 Bobby J Rowlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:20
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/10; 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)
US2861294A
Cited
US2699381A
Cited
US2917374A
Cited
US3056162A
Cited
US3337907A
Cited
US3142862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |