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US3424574A
Expired / Lapsed
US
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Ferrous metal refining
Assignee: MEHERWAN C IRANI
•
Filing: 1965-10-22
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Granted: 1969-01-28
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Meherwan C Irani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:37
CPC Classifications
C; C22; C22B; C22B7/00; C21; C21C; C21C1/00; C21C1/04; C21C7/00; C21C7/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038072A
Cited
US2083562A
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US2334621A
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US2512578A
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US2775508A
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US3261665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |