Patent US2384578A successfully refreshed from Google Patents.
US2443624A
Expired / Lapsed
US
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Range computer
Assignee: AT&T Inc
•
Filing: 1942-04-23
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Granted: 1948-06-22
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Expires: 1962-04-23
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Lovell
- 👤 David B Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/02; G01C3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |