US2928609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparation of cellulated slag
Assignee: SP Kinney Engineers Inc
•
Filing: 1954-12-28
•
Granted: 1960-03-15
•
Expires: 1974-12-28
Abstract
No abstract record available.
Inventors
- 👤 Osborne Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:12
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/08; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/026; C21B2400/05; C21B2400/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US982964A
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US1404142A
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FR628845A
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US2156316A
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US2124768A
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US2112557A
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US2159433A
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US2358900A
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US2450978A
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US2457526A
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US2565457A
Cited
US2717416A
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US2702407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |