US2871533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for melting and casting of high melting point metals or alloys
Assignee: Imperial Chemical Industries Ltd
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Filing: 1953-05-18
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Granted: 1959-02-03
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Swainson Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:03
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; B; B22; B22D; B22D27/00; B22D27/02; B22D7/00; B22D7/005; C22B; C22B4/00; F; F27; F27B; F27B5/00; F27B5/04; Y; Y10; Y10S; Y10S266/00; Y10S266/905
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) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |