US2698930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic displacement recorder
Assignee: Unisys Corp
•
Filing: 1949-03-31
•
Granted: 1955-01-04
•
Expires: 1969-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert P Gutterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US720621A
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US1588706A
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US2038647A
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US2254933A
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US2229293A
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US2370134A
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US2419195A
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US2487793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |