US2963530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous high vacuum melting
Assignee: Stauffer Chemical Co
•
Filing: 1956-07-27
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Granted: 1960-12-06
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Expires: 1976-07-27
Abstract
No abstract record available.
Inventors
- 👤 Charles W Hanks
- 👤 Jr Hugh R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:31
CPC Classifications
C; C22; C22B; C22B4/00; C22B9/00; C22B9/16; C22B9/22; C22B9/228; F; F27; F27B; F27B5/00; F27B5/04; F27D; F27D11/00; F27D11/08; H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; H01J37/32; H01J37/32009; H01J37/32018; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S164/00; Y10S164/04
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |