US3247554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum casting with electron bombardment heating
Assignee: Stauffer Chemical Co
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Filing: 1962-08-06
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Granted: 1966-04-26
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Expires: 1982-08-06
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
2026-10-29 16:51
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228; Y; Y10; Y10S; Y10S164/00; Y10S164/05
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |