US2903523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional zero adjustment circuit
Assignee: Beckman Coulter Inc
•
Filing: 1956-01-17
•
Granted: 1959-09-08
•
Expires: 1976-01-17
Abstract
No abstract record available.
Inventors
- 👤 Toomim Hershel
- 👤 Hare George Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/40; G; G01; G01R; G01R19/00; G01R19/18; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2730573A
Cited
US2744168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |