Patent FR1201070A successfully refreshed from Google Patents.
US3196384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic amplifier
Assignee: International Business Machines Corp
•
Filing: 1962-02-27
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Granted: 1965-07-20
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 William P Dumke
- 👤 Rudolph R Haering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:26
CPC Classifications
H; H03; H03F; H03F13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
AN ULTRASONIC AMPLIFIER COMPRISING, IN COMBINATION: A CRYSTALLINE BODY TO WHICH ARE APPLIED SUBSTANTIALLY PERPENDICULAR ELECTRIC AND MAGNETIC FIELDS WHEREBY THE VELOCITY OF CARRIERS WITHIN THE CRYSTALLINE BODY IS PERPENDICULAR TO THE AFORESAID ELECTRIC AND MAGNETIC FIELDS, SAID ELECTRIC AND MAGNETIC FIELD HAVING SUCH VALUES THAT
Claim 2
Dependent Claim
46 words
AN ULTRASONIC AMPLIFIER COMPRISING, IN COMBINATION: A CRYSTALLINE BODY TO WHICH ARE APPLIED SUBSTANTIALLY PERPENDICULAR ELECTRIC AND MAGNETIC FIELDS WHEREBY THE VELOCITY OF CARRIERS WITHIN THE CRYSTALLINE BODY IS PERPENDICULAR TO THE AFORESAID ELECTRIC AND MAGNETIC FIELDS, SAID ELECTRIC AND MAGNETIC FIELD HAVING SUCH VALUES THAT
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |