US2499437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacture of carbon black
Assignee: Columbian Carbon Co
•
Filing: 1944-09-12
•
Granted: 1950-03-07
•
Expires: 1964-09-12
Abstract
No abstract record available.
Inventors
- 👤 William B Wiegand
- 👤 Harold A Braendle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
APPARATUS PARTICULARLY ADAPTED TO THE PRODUCTION OF CARBON BLACK WHICH COMPRISES AN ELONGATED, UNOBSTRUCTED CHAMBER ADAPTED TO WITHSTAND HIGH TEMPERATURES AND OF SUBSTANTIALLY UNIFORM CROSS-SECTION, A BURNER BLOCK POSITIONED IN ONE END OF THE CHAMBER, A WIND-BOX ENCLOSING THE OUTER END OF THE BURNER BLOCK, A TUBULAR MEMBER EXTENDING THROUGH SAID BURNER BLOCK AND OPENING INTO THE ELONGATED CHAMBER IN A DIRECTION SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE CHAMBER, A PLURALITY OF BURNER PORTS EXTENDING THROUGH SAID BURNER BLOCK, SYMMETRICALLY POSITIONED ABOUT SAID TUBULAR MEMBER AND OPEN-
Claim 2
Dependent Claim
89 words
APPARATUS PARTICULARLY ADAPTED TO THE PRODUCTION OF CARBON BLACK WHICH COMPRISES AN ELONGATED, UNOBSTRUCTED CHAMBER ADAPTED TO WITHSTAND HIGH TEMPERATURES AND OF SUBSTANTIALLY UNIFORM CROSS-SECTION, A BURNER BLOCK POSITIONED IN ONE END OF THE CHAMBER, A WIND-BOX ENCLOSING THE OUTER END OF THE BURNER BLOCK, A TUBULAR MEMBER EXTENDING THROUGH SAID BURNER BLOCK AND OPENING INTO THE ELONGATED CHAMBER IN A DIRECTION SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE CHAMBER, A PLURALITY OF BURNER PORTS EXTENDING THROUGH SAID BURNER BLOCK, SYMMETRICALLY POSITIONED ABOUT SAID TUBULAR MEMBER AND OPEN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |