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US2965757A
Expired / Lapsed
US
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Spectral analysis of materials
Assignee: Individual
•
Filing: 1953-08-03
•
Granted: 1960-12-20
•
Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Philip W Martin
- 👤 Robert W Pringle
- 👤 Kenneth I Roulston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2443680A
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US2548789A
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US2648012A
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US2778947A
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US2659011A
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US2711482A
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US2769096A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |