US3370222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant current power supply
Assignee: Beckman Coulter Inc
•
Filing: 1964-07-01
•
Granted: 1968-02-20
•
Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jan W Haagen-Smit
- 👤 Polata Bohumil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2978630A
Cited
US3131344A
Cited
US3182246A
Cited
US3274446A
Cited
US3240997A
Cited
US3304487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |