US3068402A
Expired / Lapsed
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Desorption spectrometers
Assignee: National Research Council Canada
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Filing: 1960-09-21
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Granted: 1962-12-11
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Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 Redhead Paul Aveling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:10
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/06; G; G01; G01N; G01N30/00; G01N7/00; G01N7/14; H01J41/04
Claims Analysis
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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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |