US2702407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making lightweight slags
Assignee: Individual
•
Filing: 1951-11-06
•
Granted: 1955-02-22
•
Expires: 1971-11-06
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; C03; C03B; C03B19/00; C03B19/10; C03B19/108; C03B19/1085; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/08; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/05; C21B2400/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1650136A
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US1894208A
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US1916402A
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US2126411A
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US2315735A
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US2358900A
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US2417301A
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US2442036A
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US2450978A
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US2569779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |