US3544507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dedusting and agglomerating activated carbon
Assignee: Calgon Carbon Corp
•
Filing: 1967-08-23
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Granted: 1970-12-01
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Expires: 1987-08-23
Abstract
No abstract record available.
Inventors
- 👤 Roger V Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:27
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |