US2836501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostrictive ceramic materials
Assignee: Electric Machinery Manufacturing Co
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Filing: 1955-11-04
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Granted: 1958-05-27
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Crownover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:19
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A BARIUM TITANATE ELECTROSTRICTIVE MATERIAL COMPOSED OF A COMPOSITION EXPRESSED AS BAO, TIO2, SNO2 AND CAO AND INCLUDING TRACES OF AL2O3, CUO, FE2O3, MGO, PBO, SIO2, SRO AND ZRO2 TOTALLING NOT MORE THAN 4.26% BY WEIGHT, THE CAO AND SNO2 BEING COMBINED TO GIVE A CALCIUM STANNATE CONTENT OF 2% TO 8%, AND THERE BEING SUFFICIENT TIO2 TO COMBINE WITH ALL OF THE BAO TO LEAVE AN EXCESS OF TIO2 OF 0.9% TO 1.5% BY WEIGHT.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |