Patent US2507253A successfully refreshed from Google Patents.
US2507253A
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Stabilization of sensitivity of metallic titanate piezoelectric elements
Assignee: GULTON Manufacturing CORP
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Filing: 1948-05-01
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Granted: 1950-05-09
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 Glenn N Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/04; H10N30/80; H10N30/85; H10N30/853; H10N30/8536; Y; Y10; Y10S; Y10S264/00; Y10S264/25; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A METHOD OF TREATING ELECTRICALLY CHARGED METALLIC TITANATE PIEZO-ELECTRIC ELEMENTS TO RENDER THEM SUBSTANTIALLY STABLE WITH RESPECT TO THEIR SENSITIVITY OVER LONG PERIODS OF TIME, THE STEP WHICH COMPRISES HEATING SAID CHARGED ELEMENTS TO A TEMPERATURE WITHIN THE RANGE OF JUST BELOW THE CURIE POINT TO APPROXIMATELY 15 DEGREE C. BELOW THE CURIE POINT.
Claim 2
Dependent Claim
55 words
IN A METHOD OF TREATING ELECTRICALLY CHARGED METALLIC TITANATE PIEZO-ELECTRIC ELEMENTS TO RENDER THEM SUBSTANTIALLY STABLE WITH RESPECT TO THEIR SENSITIVITY OVER LONG PERIODS OF TIME, THE STEP WHICH COMPRISES HEATING SAID CHARGED ELEMENTS TO A TEMPERATURE WITHIN THE RANGE OF JUST BELOW THE CURIE POINT TO APPROXIMATELY 15 DEGREE C. BELOW THE CURIE POINT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |