US3437849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensation of electrical devices
Assignee: Motorola Solutions Inc
•
Filing: 1966-11-21
•
Granted: 1969-04-08
•
Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 James E Treatch
- 👤 Gerald C Von Schwedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A TEMPERATURE COMPENSATED ELECTROMECHANICAL RESONATING DEVICE INCLUDING IN COMBINATION, METAL RESONNATOR HAVING A CONTROLLABLE FREQUENCY TEMPERATURE COEFFICIENT, A PIEZOELECTRIC CERAMIC LAYER FIXED TO SAID METAL RESONATOR, SAID CERAMIC LAYER HAVING A PREDETERMINED FREQUENCY TEMPERATURE COEFFICIENT, SAID FREQUENCY COEFFICIENT OF SAID METAL SUBSTRATE BEING EQUAL IN MAGNITUDE BUT OPPOSITE IN SIGN TO SAID FREQUENCY COEFFICIENT OF SAID CERAMIC LAYER, SO THAT UNDER CHANGING TEMPERATURE CONDITIONS SAID FREQUENCY TEMPERATURE COEFFICIENT OF SAID METAL SUBSTRATE AND SAID FREQUENCY TEMPERATURE COEFFICIENT OF SAID PIEZOELECTRIC CERAMIC LAYER COMBINE TO MAINTAIN A LOW FREQUENCY TEMPERATURE COEFFICIENT FOR THE ELECTROMECHANICAL RESONATING DEVICE.
Claim 2
Dependent Claim
95 words
A TEMPERATURE COMPENSATED ELECTROMECHANICAL RESONATING DEVICE INCLUDING IN COMBINATION, METAL RESONNATOR HAVING A CONTROLLABLE FREQUENCY TEMPERATURE COEFFICIENT, A PIEZOELECTRIC CERAMIC LAYER FIXED TO SAID METAL RESONATOR, SAID CERAMIC LAYER HAVING A PREDETERMINED FREQUENCY TEMPERATURE COEFFICIENT, SAID FREQUENCY COEFFICIENT OF SAID METAL SUBSTRATE BEING EQUAL IN MAGNITUDE BUT OPPOSITE IN SIGN TO SAID FREQUENCY COEFFICIENT OF SAID CERAMIC LAYER, SO THAT UNDER CHANGING TEMPERATURE CONDITIONS SAID FREQUENCY TEMPERATURE COEFFICIENT OF SAID METAL SUBSTRATE AND SAID FREQUENCY TEMPERATURE COEFFICIENT OF SAID PIEZOELECTRIC CERAMIC LAYER COMBINE TO MAINTAIN A LOW FREQUENCY TEMPERATURE COEFFICIENT FOR THE ELECTROMECHANICAL RESONATING DEVICE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |