US2471562A
Expired / Lapsed
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Method of utilizing metallurgical slags
Assignee: ERIC H HECKETT
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Filing: 1946-03-25
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Granted: 1949-05-31
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Expires: 1966-03-25
Abstract
No abstract record available.
Inventors
- 👤 George R Fitterer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:04
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C22; C22B; C22B7/00; C22B7/04; C21B2400/00; C21B2400/02; C21B2400/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P10/25; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/959
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) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |