US2601097A
Expired / Lapsed
US
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Mass spectrometer for simultaneous multiple gas determinations
Assignee: Individual
•
Filing: 1949-07-20
•
Granted: 1952-06-17
•
Expires: 1969-07-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2310435A
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US2355658A
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US2341551A
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US2380439A
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US2387786A
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US2380082A
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US2449067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |