US2956271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low level scanner and analog to digital converter
Assignee: Information Systems Inc
•
Filing: 1957-05-06
•
Granted: 1960-10-11
•
Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/14; H03M1/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2483140A
Cited
US2677725A
Cited
US2734184A
Cited
US2784396A
Cited
US2739285A
Cited
US2802203A
Cited
US2825886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |