US2967999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveform measuring apparatus
Assignee: International Business Machines Corp
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Filing: 1957-11-27
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Granted: 1961-01-10
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 George N Gaebelein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/82; H03M1/822; H03M1/825; H03M1/12; H03M1/22; H03M1/32
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |