Patent US2225354A successfully refreshed from Google Patents.
US2225354A
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US
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Process and apparatus for the manufacture of carbon black
Assignee: Beazer East Inc
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Filing: 1937-11-10
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Granted: 1940-12-17
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Expires: 1957-11-10
Abstract
No abstract record available.
Inventors
- 👤 Schmalenbach Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:43
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/52; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/336; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-17 | 1944-06-17 | 1944-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-17 | 1948-06-17 | 1948-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-17 | 1952-06-17 | 1952-12-17 | $7700.00 | Window Closed / Lapsed |