Patent US2902142A successfully refreshed from Google Patents.
Patent US3198019A successfully refreshed from Google Patents.
US3198019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
To angle pickoff amplifier tension signal
Assignee: —
•
Filing: —
•
Granted: 1965-08-03
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
—
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A STABLE REFERENCE APPARATUS COMPRISING: A SUPPORT, AVIBRATILE STRING HAVING ENLARGED INTEGRAL END PORTIONS, MEANS FOR SECURING SAID END PORTIONS TO SAID SUPPORT TO PROVIDE A SUBSTANTIALLY FIXED STRING TENSION, SAID STRING BEING SUBJECT TO MODULATION OF SAID TENSION WHEN VIBRATING, AND MEANS FOR SERVOING SAID TENSION MODULATION TOWARD ZERO.
References Cited (Backward Citations)
US1995305A
Cited
US2546158A
Cited
US2689943A
Cited
US2466018A
Cited
US2552650A
Cited
US2974530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |