US3521959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for direct spectrographic analysis of molten metals
Assignee: United States Atomic Energy Commission
•
Filing: 1967-08-29
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Granted: 1970-07-28
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Velmer A Fassel
- 👤 George W Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:40
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0623; B05B17/0615; G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; G01N33/2025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3325976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |