US2911370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time after polarization
Assignee: —
•
Filing: —
•
Granted: 1959-11-03
•
Expires: 1976-11-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3213; C04B2235/3215; C04B2235/3224; C04B2235/3225; C04B2235/3227; C04B2235/3231; C04B2235/3251; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/768
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A FERROELECTRIC CERAMIC COMPRISING APPROXIMATELY 95 PERCENT BY WEIGHT OF A MINERAL SELECTED FROM THOSE DEFINED BY AND INCLUDING WITHIN AREA ABCD OF THE DIAGRAM IN FIGURE 3, SAID MATERIAL INCLUDING AS A SUBSTITUENT FOR A MOLAR EQUIVALENT OF LEAD THERIN, FROM ZERO TO ABOUT 20 ATOM PERCENT, IN THE AGGREGATE, OF AT LEAST ONE ALKALINE EARTH ELEMENT SELECTED FROM THE GROUP CONSISTING OF STRONTIUM AND CALCIUM, AND FURTHER COMPRISING AT LEAST 0.10 WEIGHT PERCENT, ON AN OXIDE BASIS, IN THE AGGREGATE OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NIOBIUM TANTALUM, AND THE RARE EARTH ELEMENTS INCLUDING YTTRIUM BUT EXCLUDING CERIUM.
Claim 2
Dependent Claim
104 words
A FERROELECTRIC CERAMIC COMPRISING APPROXIMATELY 95 PERCENT BY WEIGHT OF A MINERAL SELECTED FROM THOSE DEFINED BY AND INCLUDING WITHIN AREA ABCD OF THE DIAGRAM IN FIGURE 3, SAID MATERIAL INCLUDING AS A SUBSTITUENT FOR A MOLAR EQUIVALENT OF LEAD THERIN, FROM ZERO TO ABOUT 20 ATOM PERCENT, IN THE AGGREGATE, OF AT LEAST ONE ALKALINE EARTH ELEMENT SELECTED FROM THE GROUP CONSISTING OF STRONTIUM AND CALCIUM, AND FURTHER COMPRISING AT LEAST 0.10 WEIGHT PERCENT, ON AN OXIDE BASIS, IN THE AGGREGATE OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NIOBIUM TANTALUM, AND THE RARE EARTH ELEMENTS INCLUDING YTTRIUM BUT EXCLUDING CERIUM.
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) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |