US3022422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously operating analytical instruments
Assignee: Fielden Electronics Ltd
•
Filing: 1957-11-06
•
Granted: 1962-02-20
•
Expires: 1977-11-06
Abstract
No abstract record available.
Inventors
- 👤 Charles W Grove-White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:10
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/22; G01J1/24; G01N21/84; G01N21/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2844066A
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US2764536A
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US2688090A
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US2844729A
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US2792501A
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US2806957A
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US2866900A
Cited
US2875340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |