Patent US2889189A successfully refreshed from Google Patents.
US2889189A
Expired / Lapsed
US
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Digital to analog converter and plotter
Assignee: General Precision Laboratory Inc
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Filing: 1955-02-16
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Granted: 1959-06-02
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Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:29
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/0617
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309413A
Cited
US1138089A
Cited
US2101452A
Cited
US2431651A
Cited
US2567134A
Cited
US2718634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |