US2834246A
Expired / Lapsed
US
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Method and apparatus for absorption spectra analysis
Assignee: Individual
•
Filing: 1954-06-16
•
Granted: 1958-05-13
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 Laurence W Foskett
- 👤 Norman B Foster
- 👤 William R Thickstun
- 👤 Rex C Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:36
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42; G01J3/433; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G01J2003/4332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166824A
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US2393631A
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US2439373A
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US2534846A
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US2462946A
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US2562910A
Cited
US2729143A
Cited
US2708389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |