Patent US2922612A successfully refreshed from Google Patents.
US2922612A
Expired / Lapsed
US
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Automatic vacuum packing of pelletized carbon black
Assignee: SID RICHARDSON CARBON CO
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Filing: 1955-12-13
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Granted: 1960-01-26
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 James W Bulls
- 👤 James K Normand
- 👤 Jr Edwin J Claassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:07
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/02; B65B31/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA487538A
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US1489676A
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US2137334A
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US2350666A
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US2448733A
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US2546193A
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US2763458A
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US2691476A
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US2687271A
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US2725168A
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US2705607A
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US2737001A
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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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |