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Patent US2402947A successfully refreshed from Google Patents.
US2402947A
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Flux-forming fuel and process for thermally working minerals therewith
Assignee: Linde Air Products Co
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Filing: 1943-02-06
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Granted: 1946-07-02
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Expires: 1963-02-06
Abstract
No abstract record available.
Inventors
- 👤 Charles J Burch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:27
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; B; B03; B03B; B03B1/00; B03B1/02; E21C; E21C41/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-07-01 | 1949-12-31 | 1950-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-01 | 1953-12-31 | 1954-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-01 | 1957-12-31 | 1958-07-02 | $7700.00 | Window Closed / Lapsed |