US2686100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse recording apparatus
Assignee: Unisys Corp
•
Filing: 1949-04-12
•
Granted: 1954-08-10
•
Expires: 1969-04-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John Presper Eckert
- 👤 Jr John C Sims
- 👤 Welsh Herbert Frazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08; G; G11; G11B; G11B23/00; G11B23/0007; G11B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2533326A
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US2378388A
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US2378383A
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US2439446A
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US2441065A
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US2540654A
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US2549071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |